the State Fair we demonstrated "Slime", which is made with polyvinyl
alcohol, a substance not readily available to the public. Gack
is a similar material made with everyday household materials.
- Elmers White Glue or equivalent (polyvinyl acetate glue)
- Borax detergent
- Food coloring
chemicals can be bought at a grocery store.
||Two large plastic glasses (clear if possible) and a spoon
||Gack is also known as "Flubber".
- Put about 4 oz. of water in one plastic glass. Add
Borax. Stir with spoon.
- Continue to add Borax and stir until no more will dissolve.
- Put about 4 oz. of white glue in a second plastic glass.
- Dilute the glue with 4 oz. of water. If,
at the end of the experiment, the resulting GACK is too thick,
try it again adding more water.
- Add a small amount of your favorite color of food coloring
to the glue solution and mix well.
- Pour a small amount of the Borax solution into the
glass with the glue, being careful not to transfer any solid
- Stir well.
- If some of the glue solution doesn't thicken, add
more Borax solution and stir again, repeating the process until
the entire mixture has thickened.
- The resulting GACK should be rubbery, and will slowly
flow from a high spot to a low spot, such as if you try to
pour it out of the glass.