The Multi-Box set includes 3 cardboard boxes, each is a 3 in 1 combination of a storage box and a learning tool. The Multi-Boxes are made entirely of corrugated cardboard. Multi-box can be used to teach your child about shapes, numbers and letters. It is completely recyclable, made mostly of recycled material and protected by a green and non-toxic fire retardant. — Cristin Priest {Simplified Bee}