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.
For very young children around three years old, there're large beads for sale with a 10mm diameter called Biggie Beads (Perler), Maxi Beads (Hama), or Jumbo Beads (Nabbi). Hama also manufactures a type of very small, 2.5mm beads branded as Mini Beads, but they are far less popular than the medium-sized ones.irst of all, find a flat surface to place beads on a pegboard. Once you're happy with the design, preheat a dry household iron to its medium or high setting. Do not add water to your iron, otherwise the steam will ruin the beads! Cover the beads with a sheet of ironing paper.