Creating popsicles at home is a lesson in the three states matter…with a very sweet ending! Layered Watermelon Popsicles beat the heat, enthralling little scientific minds to think critically during the summer.

What you will need:

  • Popsicles molds, or paper cups with wood popsicle sticks
  • 1 cup of sugar (or sugar substitute), divided into thirds
  • 2 cups of boiling water, divided
  • ice cubes
  • 1 cup cold water, divided
  • 1 package of lime gelatin
  • 1 package of strawberry or watermelon gelatin
  • 3 tsps. miniature semi-sweet chocolate chips
  • 4 oz. cream cheese, softened
  • 1 to 1½ cups thawed Cool Whip Whipped Topping
  • wood skewer or toothpicks

summer science

The question to ask your scientist as you create: What representations of matter will we see as we make (and eat) the popsicles? What’s the matter?

Combine 1/3 cup sugar and the dry lime gelatin in a bowl.

What’s the matter? Solid!

Add 1 cup boing water and 1 cup boiling water and stir two minutes.

What’s the matter? Liquid AND gas from the steam!

science of popsicles

Fill a measuring cup with ½ cup cold water and add ice cubes until it reads ¾ of a cup. Add to the lime gelatin and stir until the ice is completely melted.

What’s the matter? Liquid only! Gas is gone when the mixture cools down!

Put the gelatin in the freezer for 20-30 minutes. Keep on eye on it. You will want a jelly-like consistency.

Repeat the same process with the strawberry (or watermelon) gelatin, but don’t put the freezer just yet.

Pour your red gelatin into the popsicle molds or paper cups. Now put in the freezer for 20 minutes only.

While your “watermelon” part of your popsicles are stiffening up, begin to make your “rind” by beating the cream cheese and remaining sugar with an electric mixer. Stir in the Cool Whip.

What’s the matter? Tough one since it’s so fluffy, but definitely solid!

Pull your popsicle molds out of the freezer and grab your chocolate chip “seeds”. Push the chips down the red gelatin using the toothpick or skewer.

What’s the matter? Gelatin…another tough one. A liquid that quickly became a semi-solid!

Next, scoop your cream cheese mixture on top, followed by the lime gelatin.

Keep in the freezer overnight.

Pull out this yummy cold treat on a hot day and discuss what is scientifically happening to the popsicle in the heat.

What’s the matter? Steam comes off the cold popsicle when it hits the hot air, then turns to a liquid (unless you eat fast!).


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