When you read through the directions for this project, it'll be easy to understand why the end result is called "moo glue" -- the sticky stuff you'll be making uses milk as the main ingredient.
For this project, you'll need to have an adult nearby, just to be safe while you're using the stove. You'll also need to wear goggles throughout the entire activity.
What are you waiting for? Get a moo-o-o-ve on!
What You'll Need:
- Skim milk
- Measuring cup and spoons
- Mixing spoon
- Baking soda
Step 1: Put on the goggles. Warm 1 cup skim milk on a stove. (Don't heat the milk to a boil.) Stir in 2 teaspoons vinegar. The milk will separate into solid chunks.
Step 2: Filter the chunks using a piece of doubled cheesecloth. Rinse the chunks with water to wash off all the acidic vinegar.
Step 3: Sprinkle 1 teaspoon baking soda on top of the chunks to neutralize any remaining acid.
Step 4: . Put 2 tablespoons warm water in a glass. Add 1/2 teaspoon borax. Stir and dissolve the borax as much as possible.
Step 5: Add the chunks of milk to the glass with the borax solution. Let stand overnight.
Step 6: Now your glue is ready. Try it out on some sheets of paper. Use the glue for a few days, and then discard unused glue.
When the acidic vinegar is added to the warm milk, it causes the milk to curdle. The protein in the milk unravels and forms new connections. When proteins change shape like this, chemists say they have become denatured. The borax causes the long protein strands to form chemical bonds between them, which makes the solution sticky. This results in white glue.
And now for a project that's a little less useful -- but a lot of fun. Keep reading fun science projects for kids to learn how to make something that is guaranteed to gross out your friends in fun science projects for kids.