This 3-piece nesting tray set from Libo is the perfect Montessori material for helping children learn mathematical concepts. The trays are made from high-quality child safe materials with a fine finish, making them ideal for any Montessori teaching aids. Featuring a large, medium and small size tray that nest within one another, this set encourages children to gain an understanding of proportions through hands on play. Each piece has curved edges that provide safety during manipulation, and the vibrant colors are sure to excite any child! This set also comes with a carrying case that makes it easy to store or transport the trays. An excellent way to engage kids in learning while they have fun; Libo’s Set of 3 Nesting Trays is an essential tool for any Montessori classroom!