When you have three little curious boys running around your house and a free afternoon, why not get a little messy and do some kitchen science? We did ours in the backyard and let the whole thing become a super sensory experience. When they inevitably try and find the remains of their apple in the mound of foam, be sure to ask them what it feels like.
How we did it:
- 1 cup baking soda
- 1 cup vinegar
- 1 tbsp water
- 1 tbsp liquid soap - (baby shampoo / dish soap)
- small bowl
- tray - (something to contain the mess)
- squeeze bottle
- pipette - (optional)
- liquid watercolors - (optional)
Add 1 cup of baking soda, 1 tablespoon of soap, and 1 teaspoon of water to a small bowl. Start mixing them together with your hands.
If you want to make a colored apple, add about a teaspoon of liquid water color (we used one pipette of lime green or red). Keep mixing until it comes together and you can shape it into a ball.
If it is too crumbly, add a little bit of water at a time to bring it together. If it is too mushy, add more baking soda to make it firmer.
When you've got a nice doughy consistency, scrape the mixture out of your bowl and roll it together into a ball. Add a leaf to complete your apple.
To make your apple erupt, put about a cup of vinegar into a squeeze bottle and place your apple into a bowl. This will get messy so make sure everything is in a tray to catch anything that overflows. Now squirt some vinegar onto your apple and watch it erupt!
What's going on?
What you see happening to the apples is a chemical reaction, and in a chemical reaction, the molecules change! Vinegar reacts with baking soda and one product of that reaction is carbon dioxide gas. This is explains the fun fizzy bubbles that erupt from your apples!