Take critical thinking with you! Portable puzzle set includes 16 pieces and comes with a book filled with 10 different types of challenges, including games and activities designed for both one and multiple players - over 30 challenges in all, targeting different skills and subjects. Some might require knowledge of math or number sequences, while others might lean more on problem solving and imaginative play. Pieces and puzzle booklet store easily inside the storage case for quick pack and play. Measures 6-1/4 x 6-1/4". Ages 5 and up.