These incredible pebble-sized polymer crystals mysteriously turn into pieces of gel-like goo when you add water. These crystals absorb 150-300 times their volume in water, and they're reusable. The instructions are packed with intriguing activities that make great hands-on activities or science projects for students. Includes: measuring scoop, superabsorbant crystals and instructions.
- 13 Jan 2005
- HOMESCHOOL BARGAIN BOOKS #1456