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Participant Age: 
7 to 12, Under 7
Approximate Cost: 
Under $10
1 to 60 minutes
Date submitted: 
Physical Challenge: 
Homemade Slime
Spend some time with homemade slime. It has some unusual properties!
  • 2 medium-size bowls
  • 1 cup corn starch
  • 1/2 to 1 cup water
  • Green food coloring
Step 1
Mix Corn Starch and Water

Pour the cornstarch into the bowl. Slowly add 1/2 cup of water, mixing with your fingers as you go. To make the mixture slimier, add a bit more water.

Step 2
Add Food Coloring

To give your mixture true slime appeal, add a few drops of green food coloring.

Step 3
Play with Your Slime

Have your child pick up the slime in his or her hands and perform the following tasks. Record what happens after you complete each task.

  • Squeeze the slime.
  • Shape it into a ball.  
  • After shaping it into a ball, open your hand.  
  • Bang on it with a spoon.  
  • Pour it from one bowl to another.  
  • Turn the bowl upside-down over a sink.  
Step 4
Talk About Your Slime

Discuss with your child the difference between solids (e.g., rock, chair, apple) and liquids (e.g., water, milk, soda). Note that solids do not change their shape, but liquids do. Then ask the following questions. Help your child answer them by reviewing what he or she learned when playing with the slime.

  • How is slime like a solid? (Sometimes it can be as hard as a rock.) 
  • How is slime like a liquid? (It pours; it changes shape.)
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