ETA hand2mind Plastic, Assorted Colors, Jumbo Cuisenaire Rods, Introductory Set with Tray (Set of 56) Teach key math topics such as - addition, subtraction, multiplication, division, fractions, geometry, & counting Help children learn important math concepts as they progress from concrete representation to abstract thinking 10 color-coded rod lengths, ranging from 2 cm to 20 cm Plastic rods are durable and easy to clean Includes 56 Jumbo Cuisenaire Rods