Just add water and watch the jelly crystals grow! Place the little white "rocks" included in this kit in colored water and kids are in for an amazing surprise! These little chunks can absorb up to 300 times their weight in water. Place them in the test tube that's included and make a kaleidoscope of colored goo. Capture a rainbow in a test tube! Includes: Water Jelly Crystals, Mixing Cups, Giant Test Tube, Coloring Tablets, Instructions. Includes 3 cool activities inside. Comes with everything you need to grow gobs of gooey crystals! Ages 8+.