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:
Box with Wooden tiles- 23 x 10 x 3.5 cm
Box with PVC tiles- 25 x 14 x 7 cm
• Recommended Ages: 4 years and up
