From the publisher:'WonderChess features innovative prize fillable pieces and an instruction book. Making kids smarter in a wonder-filled way!'This is a chess set specifically designed with the new/young player in mind. The game itself plays normally, but each piece has a base and a top portion which separates. The idea is to place a 'prize' inside each and as the child captures a piece he/she gets the prize inside. (The game comes with some nice stickers as a start.)The game also includes one of the best starter booklets I have seen. - BoardGameGeek