Made of eco-friendly material, and the surface is smooth without burr, safe for the kids. It is suitable for home preschools and kindergarten. You can teach baby addition, subtraction, division, multiplication. Ideal for teaching adding and subtraction as well as a number of other mathematic skill. It as a game to help children gradually become a sort of innovative mind constantly looking for new ways to solve the problem. The best gift for babies, children, girls and boy for birthday, baptism, Christmas and everyday life (for kids over 3 years old). It is suitable for home preschools and kindergarten.You can teach baby addition, subtraction, division, multiplication. It makes learning fun, enriches the child imagination, stimulates children's logical thinking,improves children hand eye coordination and learning ability. can recognize numbers and understand the relationship between number and quantity with this toy set. Material: High quality wood. Paint: Environment-friendly paint. 6.9