Presenting a fast, fun way to help kids build logical thinking and expand their vocabulary.

Riddles about deserts, mountains, caves, rainforests, or oceans.

" ... offer[s] a challenging exploration of problem solving mathematics and preparation for programs such as MATHCOUNTS and the American Mathematics Competition

Play detective and crack these cold case puzzles! Solve more than 100 brain teasers that will test your verbal, visual, memory, and logic skills. Track criminal

In this third Hidato collection we offer challenging puzzles in five difficulty levels with practice and bonus puzzles included. Hidato® is a pure logic puzzle