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Properties of MatterActivity for Kids

Slime DIY

Duration: 30-60 min
Difficulty: Easy
Cost: $0 to $5

Make classic slime and explore its properties!

Visit The Full Lesson Download Instructions as PDF

Material List

1Measuring cup
1Cup of water
1Tube of washable glue
1Teaspoon of borax powder
2Mixing bowls
1Spoon or spatula
1Food coloring (optional)

Instructions

1Measure ½ cup water and ½ cup glue in first bowl.
2Add a few drops of food coloring (optional).
3Mix with a spoon or spatula.
4In a separate bowl, mix 1 teaspoon of borax into ½ cup of water.
5Pour the two bowls of liquid together.
6Mix until it becomes slimy.
7Study the properties of the slime!
8Tip: Do not to use the same bowls you eat from.

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How It Works

The ingredients used to make slime undergo a chemical change when they are mixed together. Glue is a thick white liquid, but when mixed with borax it forms a new chemical that is much thicker ... and it's slimy! The properties of the new substance are different: both glue and borax can be dissolved in water, but slime does not dissolve in water. Slime is also more dense than water so it sinks (unless you mixed in a lot of air bubbles when stirring it). Try to study its other properties!