A:Each puzzle piece has a different shape and does not repeat from each other. Different puzzle pieces can reduce mistakes,making it easy to put them together. B:100 piece puzzle,large size when it is done. The size when completed is 16.2 inches×10.6 inches,which is convenient for viewing details and helping protecting eyesight. C: Many different characters and colors included. Vibrant colors and different characters can quickly gain children's love and interest. D:High-quality cardboard puzzle The cardboard shape cuts smoothly and non-toxic,making it very safe and environmental when children play.