My four-year-old is just getting interested in addition and subtraction. This creative game is the perfect thing to help encourage her new hobby. We're always looking for fun ways to help teach math. This easy DIY project from El Hada de Papel gets kids involved from the start. A simple roll of the dice and you add on height, but it could get more complicated with a series of cards that say things like "divide height by 2, add 3 inches" or "lose a turn."