Mix together 1/3 cup (75mL)warm water, 1/2 cup (125mL) Elmer’s glue, then add 6 drops of green food coloring. Stir thoroughly with a spoon and then set aside.
Mix together 3/4 cup warm water and 2 teaspoons Borax. Stir thoroughly with a spoon; pour into mixture a little at a time, stirring continuously until the slime is not sticky anymore.
Remove globe from bowl and work in your hands for 2 to 3 minutes. Store in resealable plastic bag or air-tight container. (Tip: If mixture starts to dry out, pour a small amount of water over it and knead for 2 to 3 minutes before returning to a tightly sealed container.)
Polyvinyl alcohol (PVA) is a liquid polymer and is therefore formed from long chains of connected molecules. The sodium tetraborate forms hydrogen bonds with oxygen present in the PVA chains. Hydrogen bonds occur when the positive charge of the hydrogen atoms attracts the negative charge of the oxygen atoms within the compound. The hydrogen bonds link the individual PVA strands to each other, creating a “blob” of slime. Since hydrogen bonds are weak, they will break and reform as you hold the slime or let it ooze onto a flat surface.