Reptangles by Fat Brain Toy Co.. Recommended for ages 6 years and up. A Highly Evolved Multi-Channel Building System. Build Mathematical Thinking; Capture Imagination - 2 Turtles Combine in 100 Ways!. Build Geometric Masterpieces; Construct Simple To Complex Polyhedra. Thousands of Play Possibilities Evoke Innovation & Curiosity. Outstanding Ingenuity, Modern Design, Endless Construction Appeal. Adheres To All Necessary Safety Standards for Both the Us & Europe. High Quality, Precision Plastic Construction. 80+ Builds and 50+ Puzzles, Included. 24 Building Pieces. Durable Storage Box. Full Color, Step-By-Step Exploration Guide.