Monday, November 30, 2009

Goop & Slime Recipes

When I'm babysitting for boys I sometimes bring along my "Slime Box", which is a plastic shoe box in which I stash the various ingredients for making the slime, goop, putty and other gross and slimy things that boys delight in. And they have way more fun when they get to make it themselves. 

These are also fun rainy day kids activities. Try these cool crafts for kids slime projects next time the kids complain "I'm bo-o-o-red." Caution: if you're a licensed babysitter or a prescreened babysitter be very careful with these goop, slime and putty recipes. If you use food coloring to make it more fun for the kiddies, the food coloring can and will stain clothing, hands, upholstery, grout in kitchen counters ... so either forgo the food coloring or be very, very careful.

Stretchofoam Recipe
Fill a ceramic or glass coffee mug with about a quarter inch of *acetone. (Acetone is a common ingredient in nail polish remover.)  Caution: DO NOT use a styrofoam coffee cup as it will melt when you add the acetone. It won't hurt anything, but it will be a mess. Take it from this babysitter who didn't think this project through the first time!

Place a small piece of Styrofoam in the acetone. You can break apart Styrofoam balls for this craft. It should fizzle. Keep adding more Styrofoam until you have a good sized blob.

That's it. It's done. You can pick it up and play with it.

Stretchofoam can be washed if you don't want to get acetone on your hands because it may dry your hands out, but it will lose some of it's stretchy properties.


Mix ¼ cup water & ¼ cup white glue in a bowl.

Mix ¼ cup water & 1 tablespoon *borax in another bowl. Stir borax mixture while adding glue mix.

That's it. You now have a bowl of Goop! Isn't slime science wonderful?

Warm ½ cup nonfat milk (not hot).

Pour in ¼ cup vinegar and stir.

Pour mixture through a disposable coffee filter. After the liquid has been strained you will see your Glop in the filter.



  • two mixing bowls
  • measuring cups and spoons
  • *white glue
  • *borax (in the laundry section of supermarkets)
  • green food coloring (optional)

Step 1: Mix 3/4 cup warm water, 1 cup glue and several drops green food coloring in the first bowl.

Step 2: In the second bowl, mix together 4 teaspoons borax and 1 & 1/3 cup warm water.

Step 3: Pour the contents of the first bowl into the second, but don't stir. Let it sit for 1 minute, then lift the now-congealed slime out of the bowl.

Tip: The glue in slime can make it stick to some fabrics. Also the food coloring will stain many surfaces make sure Slime stays in the kitchen or outdoors.

Mix ¼ cup water & ¼ cup *white glue in a bowl.

Mix ¼ cup water & 1 tablespoon *borax in another bowl. Stir borax mixture while adding glue mix.

Silly Putty

Mix 2 tablespoons *liquid starch and 2 tablespoons *white glue with hands until it forms a ball.

Knead 5-10 minutes. If too sticky add a little more starch. If too runny add a little more glue.

Store in airtight container or ziplock bag.

Hopefully these rainy day kids activities will save your sanity next time you're stuck inside all day while babysitting children.

* Items marked with an asteric are toxic to humans and care should be taken that children do not ingest these items. In the case of borax which is a powder, care should taken that it is not inhaled.


  1. Don't you know that Borax is toxic?

  2. Bernard, thank you for your comment re: Borax. Please note that I did some research and made some changes to the goop and slime recipes. Again, many thanks for your concerns.