Our Classroom Unit Blocks have smooth, sanded edges, are splinter-free and made from eco-friendly rubberwood, a renewable resource. Helps building skills, problem solving, fosters spatial development and encourages group play. All Guidecraft blocks are guaranteed for life.-Open-ended hardwood building blocks-Develops core concepts of size relationships, fractions and early math skills-Set includes 86 pieces with 14 unique shapes such as half circles, columns and double triangles-Crafted to standard unit block measurements-Smooth sanded edges and rounded corners-Helps develop social interaction and collaborative skills-Material: Eco-friendly Rubberwood-Educational Focus: Hand-eye coordination, sequential skills, spatial relations and mathematical skills-Suggested Age: 2+