Item Type: Talking Math Manipulative Machine Material: Plastic Battery: 3pcs AAA battery (not including) Package List 1 x Talking Math Manipulative Machine 1 x Screwdriver 1Function: Including addition, subtraction, multiplication and division tests, math games, math formulas, time limited tests, etc., To encourage your children to learn. 2Multi different Scenes: Talking math addition machine is very suitable for office, school or family use, enter the kingdom of mathematics in a way that children like. 3Professional Training In Number Games: Stimulating mathematics interest, answering questions regularly, sorting out wrong questions and checking automatically. 4Improve Logical Thinking: Learn the basic operations of addition, subtraction, multiplication and division in digital games, help your children learn basic mathematical operations faster and enhance their mathematical logic ability. 5Learn Mathematics: Interesting learning can help children quickly master basic mathematics knowledge and stimulate their interest in mathematics.