Beach Activities for Kids

Saltwater-Freshwater Experiment

How is seawater different from what comes out of your tap at home? The saltwater of the sea actually has different properties. Try this "Saltwater-Freshwater" experiment to learn what a pinch of salt can do!

What You'll Need:

  • Sea water
  • Bottled tap water
  • Two mixing bowls
  • Bar of pure soap
  • Potato peeler
  • Teaspoon
  • Eggbeater
  • Dish detergent

Next time you're at the seaside, try this experiment to compare salt water to fresh water:

Step 1: Pour two cups of sea water in one bowl and two cups of tap water in another bowl. Use a potato peeler to shave soap flakes from a bar of pure soap.

Step 2: Put a teaspoon of flakes in each bowl. Beat with an eggbeater. Which makes better soapsuds, fresh water or salt water?

Step 3: Clean the bowls and do the same experiment with dish detergent. Is there a difference between the kinds of suds produced?

For more fun activities and beach games, check out:


The following activities were designed by Maria Birmingham, Karen E. Bledsoe, and Kelly Milner Halls.

Down by the Sea Sculpture What Is Sand?Building Sandcastles Tide Pooling Beach Map Making Whale Watching Saltwater-Freshwater Experiment