ECR4Kids Hardwood School Classroom Building Shape Blocks for Kids (64-Piece Set) Hand-crafted standard unit blocks designed for children to play at daycare, school or at home Built with solid rubber wood for durability and rounded corners for added safety Includes 14 different shapes for toddlers to build different configurations Recommended for use by ages 3 and up GREENGUARD [GOLD] Certified for reducing chemical pollutants, improving air quality