As toddlers explore these hardwood materials, they will gain a basic understanding of mathematics. The handling, sorting and counting of concrete objects not only builds eye-hand coordination and motor skills but lets children discover concepts of proportion, quantity, relationship, colors, patterning, grouping and classification. Start with the set of natural colored materials and gradually add other colors for more complex problem solving. Being open-ended like unit blocks, the material can be used for language development with concepts of over/under, large/small, fit into/fit through, etc. Set includes 4 boxes, 4 single pegboards, 1 four pole pegboard, 24 beads, 4 laces with "needle" and "stopper", 28 discs. Teacher guide with suggested uses. Square sorting boxes are 5" x 5" x 2" H.