Children learn to visualize numbers and count with this one-of-a-kind Colour-Changing Abacus. Multicoloured beads change to white as children slide them across each rod, helping them practice counting and patterning as well as basic addition and subtraction. The Getting Started Guide includes 6 teacher-developed activities. Includes: 1 Colour-Changing Abacus and 1 Getting Started Guide. Ages 3 and up.