Concept-wise, this is quite useful. Design implementation-wise, it needs a solid amount of re-thinking. Two of the sides measure centimeters. You could have given a combination of IN-MM, IN-CM, CM-MM, but you did not. Thoughtless implementation. Then, you could have rounded the edges for a more secured feel for kids instead of chamfering the edges into straight cuts. The scale of the scale (no puns intended) in the photo versus the actual size are also a huge disappointment. Agreed that a product made of alluminium is not going to go anywhere but I would have liked to see a bit bigger scale. Or, at least the scale could have been given at a discounted rate. I feel a bit cheated.