@robkardashian / Instagram 1 / 9
@robkardashian / Instagram 1 / 9

Rob Kardashian is celebrating his birthday with family well wishes and a little quality time with his girlfriend and her son, King Cairo.

The once-reclusive, now ubiquitous former reality star kicked off his 29th birthday celebration on March 16, heading to LEGOLAND and unleashing his inner child and playing around with the 3-year-old, riding with him on several of the amusement park's rides.

A noticeably slimmer Rob donned a white T-shirt for the occasion, a far cry from his usual black t-shirt look. Meanwhile, his girlfriend, Blac Chyna, donned a floral Adidas shirt and floral leggings.

The amusement park trip came after he and Chyna got back from a Jamaican getaway. Needless to say, it's been a heck of a birthday week for Rob.

His family wasn't lost on the occasion, either, as many of them took to their subscribers-only websites and apps to publicly send their well wishes to their brother, now that he's reconnected with them.

Kim Kardashian West wrote, "Robby: Happy birthday!!! I love you and I hope you have the best birthday ever. I'm so proud of you!"

Kendall Jenner had similar sentiments, writing, "Happy Birthday, Bobby! Love you, you are such a light on this earth."

Khloe Kardashian, who Rob lived with for a long time and considered each other best friends, understandably had the most heartfelt message for her brother.

"Happy birthday to my sweet brother! My best friend! My ace forever!!!," she said. "My love for your knows no bounds. You are and always will be my ultimate and all I ever wish for you on this day and everyday is your true and complete happiness.

She continued, "I love and adore you Rob!! No one will ever get our bond and I love that!"

Of course, the love fest wouldn't be the same without his mom, Kris Jenner getting in on the mix.

"Happy Birthday Rob!! God blessed me beyond measure the day you were born," she said while posting a photo of her son to Instagram, "You are the most amazing man who is kind, funny, smart and you have the best heart.

"You are beautiful inside and out and have brought so much joy into my life. Thank you for being the best son a Mom could ever dream of...I love you soooo much @robkardashian and I'm so proud of you."

Kylie Jenner took to Instagram to post a throwback photo of her half brother and her.

For Kylie to wish him well could be a big step. The family was none-too-pleased when he began dating Chyna, largely because her ex is Tyga, who dates Kylie. The bother and sister seemed to end their feud over Snapchat.