Everybody loves a challenge! Help children build confidence and achieve success with fun two-piece puzzles that hone their skills at their own pace. Only matching pieces fit together, so kids can learn by trial and error. Matching helps learners identify numerals and understand number values. Kids learn about numbers, counting and sets. Details: Numbers 1-20 Fun-to-Know Puzzles design 1.44'' x 7.5'' x 7.5'' Develops Reading and language skills Aligns with common early-learning standards For ages 3 and up Contents: 20 two-piece puzzles, 40 pieces (3'' x 3'' each piece) Sturdy storage box