Name： Children's educational toys wooden abacus calculation frame abacus five-speed arithmetic rack rack Size： Packing size about: 17 * 14 * 9cm Materials: Basswood + quality green paint Colour： As shown About: This product is colorful, cleverly designed, from low to high, from left to right, to teach your baby the correct understanding of color. Let your baby learn to count from 1 to 10 colored counting beads, and then follow the rules of addition and subtraction teach baby blocks board simple arithmetic. To cultivate children's ability of practice, improve the baby's interest in the game. Let your baby learn and progress in the game.