Compiled by world-renowned authors from MENSA's highly successful puzzle-writing team. Packed with more than 40 challenging logic-based puzzles, tests and brainteasers to stimulate and entertain children. Stun your school friends and amaze your parents with your awesome brainpower as you work your way through these mind-twisting challenges. Packed with tricky logic problems these brain-busting puzzles will keep you entertained for hours.