Nine-year-old Caine Monroy and his cardboard arcade are continuing to inspire hundreds of other kids to new imaginative heights, and this week actor Jack Black went public with a personal family video of how a visit to the East LA auto part store inspired his sons to start work on their own arcade games.In the video above, uploaded Friday, son Samuel introduces his dad and brother to a game at "Sammy's Arcade." Called "speedball," players are supposed to throw the ball into a small hole in a cardboard box to win.