I found these great science kits on clearance for $2.99 at Michael's and bought 3 of them. they make 3 different experiments each!! What a deal. The first one we did dealt with Polymer's by making slime. We used the supplies in each bottle, with enough left over to try our own combinations. Erik just wanted to play with the slime (of course) but Taylor was very careful to measure accurately and try the different combinations. We made snot slime, blue goo, and slug slime.