This series of prisms demonstrates to the child the change in width (breadth), while the length remains constant.Practice with The Brown Stair indirectly prepares the child for concepts in plane geometry, area and volume.
Yunhe Montessori Hellotoy Co., Ltd. specializes in the manufacturing of Montessori, Frobel, Wooden Puzzles, Preschool Educational Toys and Kindergarten Furnitures.