This Bead Cabinet, produced by The Montessori Workshop, is surely to be the most attractive piece of furniture in your classroom. Made of Russian Birchwood. It needs to be assembled; will work with 7mm or 8mm beads. It is for Montessori primary and Montessori lower elementary mathematics curriculum materials for age group 3-6 & 6-9. It also helps children learn the numbers specially squares and cubes.