STEP THREE: Look at your objects. Ask your child if they think a particular object will sink or float in the fresh water. Remind them about the bath tub and to think hard about the toys that sink or float when they take a bath.
STEP FOUR: Drop a small ball in the fresh water. Observe what happens.
STEP FIVE: Retrieve the ball from the fresh water and drop it in the salt water. What happens?
STEP SIX: Drop the small soap in the fresh water. Does it sink or float?
STEP SEVEN: Drop the small soap in the salt water? Does it sink or float?
CONCLUSION: Salt water is heavier than fresh water, so very light things will float in both. Things that are heavy will sink in both. Some things, like soap, are heavier than fresh water and lighter than salt water. So soap will sink in fresh water, but float in salt water. The ocean’s salt water is what makes it easier for us to float, too! You can find out more by visiting Kiwi Crate.
Again, your young child may or may not grasp all of the scientific concepts being introduced in this one activity. But bet they’ll love playing in the water. And that’s what counts.