Model for chemical balancing equations(Basic M.)

Description:This is a Basic model for balancing equation. This is not for making models of the molecules, but it shows the kids that balancing chemical equations is about using every single atom and nothing is not added in or taken out.

How I designed it: When designing the model, I ran into a problem of tolerance. Because the model is interactive I had to learn about tolerance and how to solve the equation that I found online.