Teaching the cats to use the foam mallet is going to be the toughest part.
Any good cat owner knows you have to stimulate your cat's tiny brain with lots of fun and confusing toys. One crafty cat-lover in Japan has built her two cats their very own whack-a-mole game using some dowel rods, some toy mice, and an old Super Mario Brother's play set. Someone should tell these two feline friends that reaching into the mole hole is a big foul. It's practically whack-a-mole goal tending.