This holiday season, throw down the gauntlet to kids and send them on a series of exciting problem-solving quests that will get their brains buzzing. Designed by three puzzle-book pros and Mensa members, Brain-Scrambling Challenges is packed with questions that test kids' brains to the limit...and show them that problem solving = a lot of fun Endlessly engaging (and shhh...ultimately educational), this book is packed with hours of stimulating...