500 Piece Interlocking Building Blocks Toys, A Creative and Educational STEM Construction Flakes Toys, Fun Kids Plastic Disc Set (p17) SAFE FOR CHILDREN - High quality ABS materials, meets US safety standards, passes ASTM and CPSC tests. GOOD DESIGN - Exquisite groove design makes the building blocks toys more fun, more durable, and more sturdy. IMPROVE THE RELATIONSHIP - Parents and children may together enjoy the unlimited fun this plastic disc set brings. EDUCATIONAL BUILDING TOYS- Improves eye-hand coordination, engineering ability and develop creative skills to enhance child's sensory development. RISK FREE GUARANTEE - Your purchase is fully protected when you order today. If you are not satisfied with your STEM construction flakes toys, contact us any time.