Kindermatic Montessori Subtraction Equations And Differences Box 蒙特梭利 減法心算盒

This is a two-compartment box with lid, which contains a set of equations and a set of answers. All the equations and differences for the subtraction combinations 1 - 18 included. The box and the chips are made from wood.

• Dimensions of the box: 7.5 x 4 x 2 inches
• Recommended Ages: 4 years and up