The viscosity of a fluid is basically a measure of how sticky it is. Water has a fairly low viscosity; things like shampoo or syrup have higher viscosities. Viscosity also depends on temperature: engine oil, for instance, is much less viscous at high temperatures than it is in a cold engine in the middle of winter.
One small packet of 7 grams will produce about 500 grams of beads once they are hydrated. Soak overnight to a ratio of one packet of beads to 50 parts water. You can add more water or pour out any extra water when the beads expand. They can also be used to water potted/garden plants and flowers.
Plus it makes a whopping 3 gallons worth of water beads. You can also apparently find them at the Dollar Tree (with a more limited color selection) or at a Michaelâs craft store in the floral section (water beads are used as a vase filler). Buy a color assortment as you see here, single colors, or clear water beads. You can buy a little packet like ours (plenty for family fun or a small sensory tub) or you can buy a large packet of water beads (if you wanted to fill a kiddie pool or use them at a party, maybe).