Diaper Slime


Eww... diaper slime? Just in time for Halloween, this ghastly science experiment will have children of all ages entertained as they witness ingredients react to form something gross! You can do this science experiment at home with the kids using common household ingredients you have in the home providing a fun, educational experience.

Here’s what you need:

  • Disposable baby diaper
  • Scissors
  • Clear cup
  • Water in a small pitcher or measuring cup for pouring
  • Food coloring if desired
  • Cookie sheet
  • Table salt
  • Spoon for stirring

Do this:

  1. Use scissors to carefully cut away the inside liner of the diaper. Turn the diaper with the inside facing down over the cookie sheet and shake gently to get the powder (sodium polyacrylate) on the cookie sheet.
  2. Place the powder in the clear cup. Slowly add water (food coloring can be added to the water if desired). Observe what happens.
  3. Turn the cup upside down. Did anything come out?
  4. Sprinkle the table salt into the cup and stir. Now what happened?

Sodium polyacrylate, is superabsorbent polymer that can hold 300 times its weight in water! Adding the salt caused the powder to release water forming a liquid again.

CAUTION: Adult supervision is required. Keep the powder in the diaper, sodium polyacrylate, away from young children and pets. It should not be eaten and should be disposed of in the trash can, not down the sink.