This cube for (a + b)3 provides the basis necessary for the sensorial construction of higher powers of the same binomial: (a + b)4 and (a + b)5. Contained in a hinged wooden box with lid.
Yunhe Montessori Hellotoy Co., Ltd. specializes in the manufacturing of Montessori, Frobel, Wooden Puzzles, Preschool Educational Toys and Kindergarten Furnitures.