This fact-filled deck makes learning fun! Now with more than 250,000 decks sold, the popular Games for Your Brain series has filled many young minds with fascinating facts and trivia. Kids can play a variety of card games, read the facts for fun, astound family and friends with impressive new knowledge, or even use the cards as a research method for school reports. And with their handy compact size, these cards make a terrific travel game for families on thego.