Already named a Top 10 Game by Dr. Toy and recommended by the National Parenting Center, this underwater “CHALLENGE” version of the original Cogno board game has players race through an alien ocean game board, collecting survival gear and fuel cells by answering mind-bending questions (beyond trivia!) about how the universe works. A “Book of Y” explains all the science answers for the curious. Kids love the two game boards, cool characters, strategy and thought-provoking questions. Trish Garlock, owner of Treasured Child in La Grange, Ky., said customers keep renting the game from her store's game library and then calling in with credit card in hand to purchase via the phone. It's a top seller in her store, she said in January 2006.