Chembalancer is a little ... game to teach balancing equations. You type numbers in front of each molecule until there are the same number of atoms on both sides of the equation, then click the 'Balanced' button.
Our Review: Chembalancer is a nifty little HTML program which can helps out budding young chemists with those often confusing equations. A breeze to use, you just enter how many of each atom ther should be to balance and hit the button. If your kids are struggling with basic chemistry as much as I did Chembalancer will be a valuable tool. Recommended.