LeBron Is A Giant Kid At Bryce Maximus James' 10th Birthday Party

Check out LeBron James dominating a bunch of kids and acting like Billy Madison at the birthday party for youngest son Bryce Maximus James. The 10-year old hooper -- who wears #30 because of Steph Curry --  celebrated his birthday with Dad (32), big brother Bronny (12), little sis Zhuri (2) and friends with a day of football, basketball (did that boy at the 8 second mark get his ankles broken?) and a water balloon fight.

LeBron also posted this message and video to his young King on Instagram.

“Happy Bday Bryce Maximus!! Can’t believe you’re 10 years old man. Time is serious flying. Love you Young King and u make me proud to be your father every single day!! #ZhuriLikeThatsMyCakeToo

BONUS VIDEO: LEBRON CHEERING ON BRYCE AT A TOURNAMENT