4-in-1 Grow Up Puzzle Set (Multiple Themes) | Progressive Difficulty with Color-Coded Back System

This 4-in-1 puzzle set offers progressive learning for children aged 3+! With scientifically graded difficulty levels (12-38 pieces), it develops puzzle-solving skills step by step. The unique color-coded back system makes sorting easy and fosters organizational habits. Rich themes including traffic, animal seasons, and dinosaur paradise feature vivid scenes to stimulate learning interest. Durable material and safe rounded edges ensure long-lasting use. Perfect for family bonding and early education! • 4-Stage Progressive Design: 12/18/26/38 pieces scientifically graded for ages 3-6 • Multiple Themes: Includes traffic, animal four seasons, dinosaur, fairy tale princess themes • Smart Coding System: Color-number coded backs for easy sorting and level identification • Safe Material: Thick cardboard with eco-friendly ink, rounded corners, EN71 certified • Educational Value: Develops shape recognition, observation, logic, and coordination • Complete Collection: 94 pieces form 4 complete pictures (28.6×22.6cm each)