Universe of Science 6-Kit Chemistry sets. What a great way to reinforce what they're learning in chemistry! Each kit comes in a plastic tub and contains the “ingredients” for as many as 15 experiments in one tub! They give you enough ingredients to repeat the experiments over and over as well (which my kids really enjoyed). Each kit also comes with a booklet (approximately 25 pages long) with step-by-step instructions, as well as science definitions, explanations of the chemical reactions, and further instructions for how to use household ingredients to do even more experiments! You really get a lot for your money. In fact, I thought these would be your typical do-it-just-once-and-and-kiss-your-money-goodbye type kits, but that’s not what we got! I wish I had room to show you all the pictures I took of the kids playing with these. I tried them on all my kids (ages 8-15), but only the older ones understood the science behind the experiments. The younger ones just enjoyed playing. (Some ingredients may be allergens, so please check the descriptions of the individual kits on our website if this is a concern.) Each kit includes chemistry booklet with many experiments and enough "stuff" to do the experiments numerous times! The six kits in this set are: "Super Water Absorber Kit," "Rubber Flubber Experiment Kit," "Goofy Glowing Gel Experiment Kit," "Cool Blue Light Experiment Kit," "Fizz Wizard and Jammin' Jelly Reaction Kit," and "Presto! Clock Reaction Kit." All at such a low price! Total Retail Value is $54.00 Our Price is $40.50!