Have a look, how you can start with measuring and explore our mathematic system afterwards. Be fascinatet of the little scientists, who are able to discover so many things of their own, by showing them just, how to use the material. You will think, they are building a tower, like every child does, but they are measuring the hight. You will think they are pouring water from one container into the next, like every child has fun with, but they are measuring milliliters. You will think, they are throwing things in a box, like a child tidying up, but they are measuring in gramm. You will think, they can count just to ten, but they deal with numbers way bigger. You will think, how stupid those funny characters nothing to do with real mathematics, until you see children easily convert units. You will think, that this will be something just for small children, until you have seen somebody solving a equation with the material, which you might had difficoulties with.
So have a look at:
In the end you will think, how interesting our mathematic system really is and how great not to learn just on a paper.