: Offers 4 oz. packages of Water Gel Powder for around $6.95. They provide detailed safety information (SDS) and clear instructions for science projects. Really Good Stuff : Sells 1 lb. bags of Steve Spangler Science Water Gel Go to product viewer dialog for this item.

When used for plants, these are often labeled as "water-storing crystals" or "hydrogels." They help improve soil moisture retention and can last in the soil for up to 7–9 years.

If you need high-speed absorption for classroom demonstrations or "slush powder" for magic, educational retailers are your best bet.

for approximately $16.99, which includes a guided teaching companion.

: Look for brands like Science Gone Fun or Steve Spangler Science for small to medium jars of polymer powder specifically labeled for "vanishing water" tricks. For Gardening & Agriculture

The Ultimate Guide: Where to Buy Water Gel Powder for Any Project