Below is the Instagram post which Wayne Rooney posted the Video
It was quite a day out for the Rooney family at Old Trafford on Sunday.
Wayne's injury prevented him from playing a part in Manchester United's draw with Arsenal.
But as the skipper joined his teammates for a lap of appreciation after the final home game of the season, son Klay drew cheers for having a kickabout by the Streford End.
And it seems Kai, 5, didn't mind the attention either from Reds supporters.
As Wayne put it on Monday: "I stopped to sign some autographs at Old Trafford yesterday and turned around to find Kai doing the same."
Louis van Gaal also enjoyed himself after the game, joining in with a chant when fans asked him to as he was signing autographs outside the ground on Sunday evening.
Kai showed he has perfected the art of diving well in advance of being of an age to play football at Old Trafford
Kai Rooney is seen here enjoying kicking a ball at Old trafford after the Man Utd vs Arsenal Match
Kai enjoyed a kickabout on the Old Trafford pitch as the United players performed a lap of appreciation