Features Great Math GamesThis educational toy teaches basic math manipulatives and introductory math skills, and helps children quickly understand the addition and subtraction of numbers through games. Ideal for introducing numbers to children at home preschool activities or school. Safe MeterialMade of non-toxic and safe ABS material,Smooth and burr-free, without cutting your child's hands while playing.Toys Include Monkey balance set with 30 double-sided cards, 19 monkey figurines, digital mode 1-10, 2 weighing plates, 1 monkey scale, 1 base and instruction manual. Simple & FunThis STEM game is easy to assemble and easy to learn, children and families can start playing instantly.Cute monkey shapes and colorful design can stimulate kid's curiosity,attract children to learn.Build children's interest in learning through games. Multi Level Game PlayHas 3 different levels to keep things interesting.Meet the learning needs of more ages. Note: The front and back of the double-sided card are not related, the back is not the result of the front. INTERACTIVE LEARNINGAn ideal teaching tool for parents and teachers who is looking to encourage and reinforce divergent thinking at home, school, and during tutoring sessions HOW TO PLAY:--30 double-sided cards show three different levels: 1. Simple difficulty - green card, digital recognition. 2. Medium difficulty - purple card, learning count. 3. Complex difficulty - blue card, Addition and Subtraction. --19* monkeys and 10*weighted numbers 1-10Numbers are sturdy and weighted accordingly so adding them up on the scale and either using the number that is the sum (1 + 2 on left = 3 on right) or just balancing them with the monkeys. Specification: Item Weight: 1.39 pounds Quantity: 63PCS Package Includes:30* Two-Sided Cards19* Monkeys10*Weighted Numbers 1-101*Monkey Balance Scale2* Weighting Pan1* Stand1*Instruction