I created this for my struggling Middle School students. Easy, Fun and Clean way to reteach Balancing Equations. This can be used with crayons / coloring pencils or pop beads (found in art section at Walmart). There is a table to build 6 molecules, and 9 simple chemical equations to balance. I have done this both ways with coloring pencils and with the pop beads, both are fun and really help those students who are struggling. key included. If buying the pop beads, my kit has 10 of each - red, orange, yellow, pink, black and white and 50 green and 50 blue.