Important: To take advantage of all the features of this game, an IKEA Trofast box is required, sold separately. The board has been designed to fit perfectly into this box, providing a complete and organized gaming experience. Interactive Learning: The Addition and Subtraction Learning Machine is a teaching tool that turns simple mathematical operations into an exciting game. The 19 holes where the gum balls go challenge children to solve math problems in a practical and visual way. Colored Pompoms: Vibrantly colored pompoms are included that can be used as chips to represent numbers in mathematical operations. Children can easily combine colors and count how many pompoms are left in the machine after solving the operation. Whiteboard: The upper part of the table has a white board that allows you to write simple addition and subtraction with a marker.