FREE Chemistry Kits through ACS. These hands-on chemistry kit and shipping, are both free. These kits are designed to teach 4th through 8th graders about the clues of chemical change. The kits come in sets of 12-32 (working in groups of 4), so if you are a homeschooling parent I recommend you go in with others on this. It says kits can only be mailed to schools, and as far as I am concerned homeschooling is a school!