INF Daily spotted Jack Black and his wife Tanya Haden in Coldwater Canyon Park in Beverly Hills. The couple took their two sons to play, and it looks like Jack had more fun than the boys! Dressed up in a train engineer outfit (minus the bandana), Black was photographed going down the slide, playing in the sand pit, and tossing a frisbee with the kids.

It’s not as if Jack doesn’t ever get to act like a child and make wacky faces for the camera. Just watch any of his movies. He must love playing the big kid and this is great acting prep.