Quality Montessori Materials for Toddler,
Primary and Elementary Environments.
E&O Montessori USA.
This material introduces the child to the unit combinations of multiplication.
Includes 1 box containing 5 sets of colored bead stairs; 1 box with 23 Golden Bars of 10, and 1 box containing 1 black and white bead stair. The 3 boxes fit into a beech wood tray.