【math cubes】Simple and easy to understand. Makes maths more interesting for children . Helps children learn place value, number concepts, logical thinking, addition, subtraction, model position and model reorganisation. 【Base 10 math cubes】It is distinguished by different colours. It is easy for students to better understand the numerical values. 【Suitable size】: very suitable for children's small hands, easy to operate by hand. 【More Play】:It is made of safe and non-toxic materials. It is stronger than foam cubes and can be used to build buildings or shapes. PS: Box color is random.