By The Book Stacking Puzzle

Balance your books! In this original 3-D puzzle, stack up to 12 differently shaped books - and one clever cat - so that the upper shelf lies perfectly even across the top. Use the special included level to make sure everything is aligned. Master all 40 challenges and you're on a level above the rest!

Contents:

• 40 challenge cards
• 12 wooden books
• 2 wooden shelves
• 1 cat figurine
• 1 balance level
• Rules of play