Kids love learning and playing checkers with these oversized, prize-fillable pieces. This set is especially beneficial to pre-chess youngsters for developing strategic-thinking skills.  The Tic-Tac-Toe board on the backside has three fields for regular, simultaneous or 3-dimensional Tic-Tac-Toe.  Included are two WonderReward cards, WonderFiller stickers, and game instructions to round out the fun.