This giant-sized version of the classic stacking tower features eleven geometrically-shaped, wooden rings in vibrant rainbow colors that stack on a center post. Children practice eye-hand coordination and dexterity by sliding the rings onto the post - in any order at first - later learning about size and color sequencing as they re-create the tower"s conical shape. They can be used to practice counting, too! The size of this stacker really IS Giant! It stands more than 15 inches tall, which means each ring is well over an inch in height! The diameter at the base is 9.5 inches... that"s BIG!! The top-most piece is a triangle, the second is a square, the third a pentagon, and so on - with each conscecutive piece having one more side than the last. Being more like blocks than rings, the pieces will stand on their sides, and can be used in all kinds of open-ended play as well. Not to mention, caregivers can find many ways to create extended learning opportunities for children as they get older, particularly by using the rings as geometric math manipulatives that children can pick up, feel, measure and experiment with. Minimally finished to retain the natural feel of the wood. Edges are removed and pieces are dyed with non-toxic, child-safe colors (no varnishes), and natural, food-grade oil finishes. Blocks are 1.6 in. (4 cm) thick. For children age 12 months & up. About Grimm"s: Grimm"s Spiel und Holz Design has been manufacturing high quality, imaginative wooden toys since 1978. Inspired by the philosophy of Waldorf education, these beautiful and unique toys are designed with simple shapes, vibrant, natural colors, and a gentle texture that can be enjoyed by both children and adults of all ages. Grimm"s toys are designed with the intention of helping children discover and develop their own creativity through simplicity of shapes, leaving plenty of room for independent play and imagination.