- Cake pan or other container with deep-ish sides
- Baking Soda
- Vinegar or lemon juice
- Green food coloring
- Spray bottle or small bowl
- If using a bowl, also have a spoon
- Coins/spare change
Prep the activity:
- Place a trash bag or plastic tablecloth over the “experiment area” (food coloring can stain!)
- Spread out the coins on the bottom of your cake pan
- Cover the coins with baking soda
- Fill the spray bottle or small dish with vinegar/lemon juice and green food coloring
Invitation to play:
- Welcome your little one(s) into the science area and explain that some leprechauns stopped by and left a science experiment...and some treasure!
- Invite them to begin investigating---spraying the spray bottle or carefully spooning some vinegar onto the baking soda
- Inquire: What is happening? What do you notice? What do you hear? Why is that happening? What is hiding under the baking soda?!
- Vinegar is an acid and baking soda is a base. When acids & bases are added together--we get a chemical reaction! A chemical reaction is when you combine two substances and create something new. In this case, we are combining vinegar (a liquid) with baking soda (a solid) and getting a gas (carbon dioxide!) We can HEAR the carbon dioxide being created when we listen for the fizzing/bubbling sound.
Happy St. Patrick’s Day!