Froebel 2contains two 2-inch cubes, one 2-inch cylinder and one 2-inch sphere，all in a beechwood box. From this toy, children can differentiate the pieces by naming the geometric shapes. Sort them. Count the number of pieces or the number of surfaces, edges, corners, etc. Introduce the concepts of on/under, front/back, up/down, in front of/behind, etc. Simple physics concepts can be discovered. Some of the solids will roll (sphere, cylinder) and some will stand (cube, cylinder). The idea of resonance in sound also can be learned by tapping the solids together or onto the table. By exploring these properties, children will be naturally curious and their discoveries will create a foundation of basic science.The Froebel Gifts are good educational toys for kindergarten. they certainly were the first materials designed for child development, as Kindergarten was the original preschool method. Also can sell the inner parts separately or do OEM order.