The advantage of our product is pupils can observe a 2d plan become a 3d object which they can know the concept of volume with a concrete object but not in an abstract way. The disadvantage of this product is the value of length, width and height on every example are very large, pupils may face difficulties to calculate so these values should be lesser and pupils are easier to calculate. We should create more real-life examples in the product so it is more suitable for a group of five to six students to use this product.