Bøger i Challenging...Books serien

Children must find up to 100 differences in each "odd one out" puzzle in record time! It's not easy to solve them---but it's such a thrill, kids will keep coming back for more. When completed, favorites can be colored too. Each of the books in the Challenging...Books series feature enteraining puzzles with time challenges, so kids can try to beat the best of the rest.

Beat this! Their challenge, should they choose to accept it, is to get to the end of each maze in record time! Every maze starts easy and gets harder, with time challenges to see if kids can beat the best of the rest.