Drop your colorful Water Marbles in a cup of water and watch in shock as they grow over 200 times in size! In a matter of hours, you will have hundreds of beautiful, full-size Water Marbles. The warmer the water, the faster they hydrate. Throw them, roll them, bounce them, and catch them. Enjoy the hot colors and the unique patterns. Water Marbles are slippery, slick and cool. Water Marbles are non-toxic, and safe for ages 3 and up. Incredible Science Fun Learning Ideas: Learn about the incredible properties of polymers as you grow the Water Marbles. Discuss hydrophilic properties and superabsorbent polymers. Dry the “balls” and determine how fast evaporation will take place and then start the process again. Hypothesize what will happen to the orbs once the water evaporates from them. Discuss color, light and classification and how these water hungry crystals can play a huge part in helping our environment. Find a water-safe surface and play the slimiest game of marbles in town, or try out your new jelly bouncy ball. You can even try to grow your amazing spheres in different liquids, like milk, vegetable oil, or salt water. Use a notebook and record your hypotheses and observations!