内容简介
Inthistitle,morethan100fiendishpuzzlesdividedintofoursections:mental,word,numberandmemorychallenges.Eachbrainteaserhasatimelimit,usuallybetween30secondsandthreeminutes-attheendofeverychallenge,thechildticksa'Youdidit!'boxora'Notthistime'box.Answersareattheendofthebook,alongwithascoringtablethatallowsreaderstocharttheirgrowingbrainpowerorcompeteagainsttheirfriends.