In a large mixing bowl, combine a 1/2 cup of glue with 1/2 cup of hot water and mix well.

Mix in your sand.

Mix a 1/2 teaspoon of borax into your remaining 1 cup of hot water and stir, letting the borax dissolve

Now pour the borax water into your glue mixture and stir (ingredients should start coming together quickly to form slime).

Pour out the excess water, remove the slime from the bowl, and knead the slime in your hands for a couple of minutes.