AceShowbiz - It seems like Tristan Thompson has become more open when it comes to sharing his moment with his children on social media. The Cleveland Cavaliers has previously posted several pictures of him with his daughter True Thompson, and now he takes to Instagram to upload a series of rare pictures with his son Prince.

The pictures, which were posted on the social media site over the weekend, were taken when Tristan accompanied the two-year-old to a friend's birthday party. In one photo, Prince was seen riding a horse as his father flashed a big smile beside him. There was also an image of Tristan helping the little boy blow some bubbles as well as a photo of them posing with balloons.

"We had the best time at Cali's Birthday party!!" Tristan captioned the sweet pictures. For the birthday party, he sported pink shorts, a white T-shirt and matching sneakers and a hat. On the other hand, Prince looked adorable in Nike joggers and a plain T-shirt.

Prince is Tristan's child with ex-girlfriend Jordan Craig, whom he dated for two about two years before he moved on with Khloe Kardashian. The two reportedly remained close following the split for the sake of their son. "It's not romantic, but Jordan has always been extremely supportive of Tristan," an insider said to Us Weekly. "Tristan is very involved in Prince's life, but during the basketball season, it's challenging."

While Tristan spent his weekend having fun with Prince, his other child, True, just hit another milestone. Khloe recently shared on Instagram Stories a couple of videos of the one-year-old girl walking for the first time. In one clip, the toddler was seen making her way from a ball pit to her mother's arms while they were having fun in a playroom. "Yay!" the "Keeping Up with the Kardashians" star exclaimed once True fell into her hands.