Kim Kardashian and Kanye West took their daughter to the museum in celebration of her first birthday yesterday (15.06.14).
The couple, who got married last month in Florence, Italy, spent the day at the Children's Museum of Manhattan in New York, exploring five floors of literature, science, media and art to mark the tiny tot's first milestone and to celebrate Father's Day.
However, it seems the educational visit was too much for the baby as Kim later shared a photograph on her Instagram account of North and Kanye, 37, fast asleep in bed, wearing matching outfits.
She accompanied the adorable snap with the caption: "This is what life is about! Our baby girl turned 1 today! We played so hard they passed out while we were watching the game! Happy Father's Day to the best daddy in the world! The way you love our daughter and protect her makes me filled with so much love! #BestDayEver #Twins #HappyFathersDay #HappyBirthday (sic)."
Meanwhile, Kim and Kanye have decided to postpone North's birthday party until next weekend, so that both of their families can fly to Los Angeles for the lavish event.
A source said last week: "They are throwing her a big party next weekend and Kourtney [Kardashian], Khloé Kardashian and [Kourtney's] kids are coming home for it."

Elisabetta Canalis has had a miscarriage.
The 35-year-old TV presenter has posted on WhoSay that she has tragically lost her unborn child and she's offering her support to other women who are going through the same "suffering".
Elisabetta - who was due to give birth in the autumn - wrote: "Unfortunately, life gives you ... a reality that you do not expect, and that is very hard to accept, even if you think you are strong enough and prepared. You're never really ready to be told that there is no more beating [heartbeat] and that it had already stopped long ago.
"I just want to say to all those women who are going through it to stay strong because life goes on and it is nobody's fault and nature acts in incomprehensible ways. We can only accept it. I just want to say that I feel you close, if you are suffering as I am doing. We can't deny it, it's like an incessant sorrow you can't get rid of."
The Italian beauty - who was previously in a relationship with George Clooney - insists she's "lucky" to have her boyfriend Brian Perri to support her through the ordeal and she's hopeful that their future life together will be full of happiness.
She added: "I know I'm lucky because I have a special man next to me that I wish all to have. The future is full of surprises and happiness and there's a lot of hope, I keep on believing in it."

Britain's Queen Elizabeth will officially open the Commonwealth Games. The monarch and her husband Prince Philip will attend the opening ceremony at Celtic Park in Glasgow, Scotland, on 23 July, while their sons Prince Charles and Prince Edward will a...

Marc Baylis has confirmed he's leaving 'Coronation Street'.
The actor, who plays Tina McIntyre's killer Rob Donovan in the ITV soap, is hoping to keep fans in the dark until the last minute about why Rob and his brother-in-law Peter Barlow (Chris Gascoyne) are leaving Weatherfield at the same time.
Probed about Chris and him both leaving the programme at the end of the year, he announced: "We are indeed. We're both leaving at round about the same time. This is why we can openly talk about it because it doesn't give anything away, it just entices everybody."
Reminded that most killers on 'Corrie' tend to meet a sticky end themselves, Marc coyly said: "Let's hope that doesn't happen. We're trying to keep it as open as possible. It's fortunate that we're both moving on to pastures new..."
The 37-year-old actor, whose sneaky alter-ego finished Tina off with a metal pipe after she fell to her death, will miss sharing scenes with his former co-star Michelle Keegan and says she will go down in soap history.
He enthused during an interview on ITV's 'This Morning': "She did great. She was either lying in a puddle for half an hour, falling off the balcony or she had blood all over her.
"She did a great job. I hope we're given her the send-off she deserves, she's a massive part of the show and she always will be ... it's a big loss."

Coronation Street's Amy Kelly has been handed a new one-year contract.
The 18-year-old actress - who plays homeless teen Maddie Heath in the ITV soap - has impressed soap bosses so much in her lesbian storyline with Sophie Webster (Brooke Vincent) they've extended her contract.
Amy, who had no acting experience before taking on the role, is said to be delighted to continue playing Maddie.
A source told The Sun newspaper: "The bosses are really pleased with Amy. They were delighted to get such high figures for the kiss [between Maddie and Sophie].
"It was after that they decided they wanted to extend her contract.
"Amy absolutely adores being in 'Corrie' and has made some great pals on set so we hope for great things for her in the future."
'Corrie' executive producer Stuart Blackburn previously praised the newcomer, insisting she would have a job as long as he was in charge.
He said: "Amy Kelly as Maddie Heath is a keeper. The joy with Amy is that she has no idea how good she is. Short of [a] writer bringing in another story that I haven't expected, or Amy wanting to go, the character of Maddie will be here as long as I'm here."

Lucy Watson wanted a boob job when she was younger.
The 'Made in Chelsea' beauty has confessed to wishing for bigger breasts to match her "big bum" in her formative years, but has now got over the awkward phase.
She exclusively told BANG Showbiz: "When I was younger, I used to want a boob job but now I think it's quite fashionable to have a small ones.
"My bum is so big, so I wanted to make it in proportion. Now I'm like, 'Whatever, big bum. Don't care.' "
The 23-year-old star is confident about her figure and feels "lucky" she is naturally slim.
She added: "I am very confident in my own skin. I don't really have a [body hang-up].
"I'm very lucky that I have a very slim figure. "
Lucy - who previously dated co-stars Spencer Matthews and Jamie Laing - recently admitted she enjoys pleasing her men in the bedroom and often receives sexual "requests" from fans on social media.
She explained: "I have weird fan requests everyday. It's all very sexual. People wanting to 'do' you. I read them and laugh, and I never reply."
Lucy Watson is the face of Lipsy's autumn/winter 2014 VIP collection, which is available at the end of the month.

James Blake has enlisted the help of Kanye West and Bon Iver for his third album.
The 'Retrograde' singer, who is working on the follow-up to his successful second record 'Overgrown', which was released last year, and has teamed up with the 'Bound 2' rapper and Bon Iver's Justin Vernon.
He told Billboard magazine: "I'm getting there. Every song is about 50 per cent done.
"There are people I've been talking to for a while who so far we haven't really linked up just because of scheduling, but recently we have.
"Justin - Bon Iver - I've done some writing with and I think we'll continue to do that, and you know sporadically Kanye when he's around. It's hard to say what'll end up on the record."
The Mercury Prize winner is eyeing an early 2015 release for the new album and claims there is a third big name he is planning to work with but he's keeping their identity a secret at the moment.
He added: "There's somebody else I don't want to mention right now, but who I'm really excited about too."
James, 25, admits he's had a "completely different life" since the release of his self-titled debut album in 2011 and claims he has a lot more freedom when it comes to writing.
He said: "The [album] I'm writing now, I've had more focus doing this than I have before. I'm having more fun."

Sinead O'Connor sounds "like she's 16" on her cover of 'I Would Die 4 U'.
The 47-year-old singer - who shot to international fame with her version of Prince's 'Nothing Compares 2 U' in 1990 - has rerecorded the track for 'Purple Reggae', a reggae tribute album to 'Purple Rain' compiled by Radio Riddler, and thrilled the remix outfit with her "beautiful" rendition of the track.
Frank Benbini, who makes up Radio Riddler with his Fun Lovin' Criminals band mate Brian 'Fast' Lesier, said: "She did such a beautiful job on it - she sounds like she's 16 when she sings it. It's so amazingly relaxed vocals and sweet, it's really something that song.
"I sat in the studio and she was quite nervous, which is I thought was quite funny because I sat there and I was nervous. And yet it was a beautiful sweet session that we did."
Sinead initially turned down the approach from Frank to be a part of the album - which also features vocals from the likes of UB40's Ali Campbell, Madness singer Suggs, and Beverley Knight - until he fully explained the concept.
He exclusively told BANG Showbiz: "I went to an event in Dublin and Sinead was there, I approached Sinead and said, 'Would you ever consider covering a Prince song?' and she said, 'No.'
"I explained we were doing it in a reggae style because she is a huge reggae fan. I played it to her and she was like, 'Oh that sounds interesting.' "
Radio Riddler release the single 'Purple Rain' featuring Ai Campbell on June 23 and play The Jazz Cafe on June 25. The album 'Purple Reggae' will be released in September through MITA.

The BBC has launched an annual music awards.
DJs Fearne Cotton and Chris Evans will host the first live show later this year, which is set to be the biggest music event after Glastonbury, bringing together BBC One, BBC Radio 1 and BBC Radio 2.
A panel of BBC presenters and producers will decide the best British artist and international artist gongs, while TV viewers and radio listeners will select the year's best song.
The ceremony is set to rival the annual BRIT Awards on ITV and the show will feature a number of performances to review the year, as well as collaborations between well-known artists and the BBC Orchestra.
BBC Radios 1 and 2 and 'The One Show' will give fans a peek behind the scenes.
BBC director general Tony Hall said: "Today's the start of something very special for everyone who loves music.
"BBC Music is a celebration of the brilliant musical talent across our country. We'll be joining up music on television, radio, iPlayer and online like never before.
"There'll be new shows, new partnerships and whole new ways to enjoy music."
The awards are part of a new music strategy for the BBC, bringing together TV and radio programming, digital services and provisions to support emerging talent.
The event will be held on 11 December at London's Earls Court and acts set to perform are yet to be announced.

Simon Kinberg has revealed 'X-Men: Apocalypse' will be set in 1983.
The 40-year-old writer and producer of the superhero film series made the revelation during a podcast about the latest instalment, 'X-Men: Days of Future Past', according to ComicBookMovie.com.
Kinberg stated that the "next movie takes place in 1983", meaning there will be a ten year gap between 'Apocalypse' and the events of 'Days of Future Past'.
The news also means that Michael Fassbender (Magneto) and James McAvoy's (Professor X) characters will be twenty years older than when they first appeared in 'X-Men: First Class', suggesting they will have to undergo an ageing makeover for the next film.
It is so far unknown how Apocalypse himself will be introduced into the series, although it's been suggested that something earth-shattering will have to take place in the intervening ten years in order to awaken the world's oldest mutant.
Fassbender and McAvoy are expected to be rejoined by 'Days of Future Past' co-stars Jennifer Lawrence (Mystique), Nicholas Hoult (Beast) and Evan Peters (Quicksilver), and it's also been confirmed that younger versions of characters Cyclops, Jean Grey and Storm will appear, along with Gambit and possibly a younger Nightcrawler.
'X-Men: Apocalypse' is scheduled for UK release on May 19 2016.

Gerard Butler insists the sequel to 'Olympus Has Fallen' will be "pretty insane".
The '300' actor - who will reprise his role as secret service agent Mike Banning in 'London Has Fallen' - claims it will be a struggle to make it as good as the original, but is convinced they'll be able to do so.
He told Collider.com: "That ['London Has Fallen'] was one that kind of came out of nowhere. The first one ['Olympus Has Fallen'] was pretty insane and it's the same with this. How do you top that? But that's what we are trying to do right now."
Although Butler, 44, is yet to start filming the movie- which is due out in October next year and also stars Morgan Freeman and Aaron Eckhart - he let slip that the plot will be just as thrilling as the previous instalment.
He said: "It's about a terrorist attack in London and the president is over there because there's a funeral for the British Prime Minister which is part of the plot to get everybody who is anybody to London. Then the s**t hits the fan."
Meanwhile, Butler's latest movie 'How To Train Your Dragon 2' opened in cinemas this week.
The hunky actor - who plays Stoick the Vast in the new animation - recently described making the children's movie as "beautiful exhilarating experience".
Talking on US chat show, 'Late Night with Seth Meyers', he said:"It's good fun making an animated movie. Especially when you do your thing, your voice, then you let it go. It took a while, it was three years in the making, then I'm like an audience member and I turn up and I'm blown away. It's such a beautiful exhilarating experience."

Britain's Prince George watched his first polo match yesterday (15.06.14). The playful 10-month-old prince - clad in a white shirt and pink dungarees - joined his mother Duchess Catherine on the sidelines at the annual Jerudong Trophy Polo Match at th...