In this interactive simulation, users adjust the coefficients in an equation while the molecules are depicted in a box above the equation. This allows the users to visualize what the symbols in the chemical equation actually mean. They can count the number and kind of each atom and how a change in the coefficient changes the count of each atom. Once the equation is balanced, a big smiley face appears to indicate that the same number and type of atoms are present in the reactants and the products. In the introductory section, users can access a tool box in order to view a bar chart of each type of atom present in the reactants and products to reinforce the idea of what a balanced equation means. Alternatively, they can view a scale for each type of atom present that balances once the same number of each is reached on the reactant and product sides. After completing three introductory equations, the user can choose to play a game with varying levels of difficulty to reinforce the concepts.