Just add water to unleash the fun! Hydrate Silly Squares and try to stack and build with them, watch your Slippery Spheres grow over 100 times their size in mere hours! Throw them, roll them, bounce them and watch their colors blend. Make your own multicolored slime however you like it, thick or thin, chunky or smooth! Grow your own multicolored miniature icebergs with Jelly Stones. Mix the polymers together and make your own creation. Complete set comes with all the polymers needed as well as an activity and experiment guide.