【Fun Educational Toy】 Learn "weight" and "addition/subtraction" in a fun way by applying the principle of a balance scale. While playing with balance, you can learn basic arithmetic skills, counting ability, and color recognition. 【Study of Numbers and Weights】 There are 10 numbers from 1 to 10 with different weights. By placing the numbered weights on the balance scale, you can physically feel the magnitude of the numbers. There are 19 monkey weights and 30 double-sided cards with animals and numbers. It's a fun way to learn simple addition by placing an equal number of monkey weights on the balance scale trays to balance the monkey scale. 【Safe Material】 Made of environmentally friendly ABS plastic, carefully crafted, with no strange chemical odors or burrs, so you can play with peace of mind. Also, for young children, all dangerous corners are rounded for excellent safety. Recommended age: 7 years and up Please do not leave children unattended while playing. Please understand that this is a personal storage item before purchasing. The box has some scuffs and dents.