How to make slime

Slime. This non-Newtonian gelatinous wonder has been known to bedazzle Earth creatures both large and small.
Some say the original recipe was the result of a misguided experiment that went horribly wrong; others say that it was handed to a 10 year-old boy in Oregon by Ghost Pirates, who promptly turned to dust after revealing their secret.
We have three different recipes to share, none of which should result in spontaneous combustion.
But nonetheless, proceed at your own discretion.
Recipe #1: (Simple slime or 'gak')
Materials:
1 oz. School glue
1/4 Cup Borax (sodium tetraborate)
Food Coloring (optional)
1/4 Cup Water
Two small bowls
Instructions:
In one bowl, mix the glue with the water. If you want to add color to your slime, now is the time to add the food coloring.
Add the borax and stir slowly
Knead the mixture with your hands until it becomes less sticky. Discard any leftover water.
Store in a plastic bag to retain moisture and keep in a refrigerator to prevent mold.
Recipe #2: (Movie slime)
Note: This slime is non-toxic but make sure to wash your hands after playing with it.
Materials:
1/2 Cup Polyvinyl alcohol (PVA)
2 tsp Borax (sodium tetraborate)
A glass jar
Food coloring (optional)
Stir stick
Instructions:
Pour the polyvinyl alcohol in the glass jar. Add food coloring now if you want colored slime. Stir slowly.
Add the Borax to the glass jar. Stir slowly.
Once the slime has formed you can remove it and play with it. Just don't eat it!
Store in a plastic bag to retain moisture and keep in a refrigerator to prevent mold.
Recipe #3:
Materials:
7 Tbsp. Skim milk
1 Tbsp. Vinegar
1/4 tsp. Baking soda
Coffee filter
Bowl
Stir stick
Instructions:
Combine the milk and the vinegar in the bowl and stir slowly until solids begin to form
Let the solids sink to the bottom of the bowl and then strain the contents of the bowl through the coffee filter. This may take a few minutes.
Add the baking soda and knead the mixture until you reach the desired consistency.