Toy weigher

Printable toy weigher - learning children numbers,arithmetic and concepts more, less, equal.
Each digit has a weight equal to the number - 1 - 1 g, 2-2 g, and so on. How heavy the star you have to know yourself. We can solve simple arithmetical: 2 + 1 = 3, 3 + 4 = 7, 1+2