In each box you get two decks of cards, held together at the bottom with a grommet. The questions are on one side of the card, and the answers are on the next card, so kids can play it alone or with friends, as a review of the grade just finished or preview of the grade to come.

Teachers use it in school, parents pack them for vacation. And with its jazzy packaging, it's the perfect birthday gift and stocking-stuffer.

Box sets measure 2 3/4 in. x 7 1/4 in. x 2 in.