Fizzy Science!

Baking soda, vinegar, and food coloring... a recipe for fun!

I dyed the vinegar and showed the kiddos how to use a pipette, then let them go.

 
 I love how the vinegar fizzes, the dye just made it more fun.  The kiddos tried their hand at color mixing, but it didn't work so well.

I asked them: "What does it sound like?"  -  "Bubbles!"
I asked them: "What happens when we mix the baking soda and vinegar together?"  -  "Fizz!"

All went well until a pipette that had some baking soda on it was dipped back into the vinegar.  We quickly held the cup over the pan of baking soda and as it fizzed up and out of the cup and splashed down into the pan, LOTS MORE FIZZING!  So that began a new game.   Pouring cups of vinegar into the pan of baking soda.  Fizz, stir, fizz some more, pour some more.

Soon our pan of baking soda became a pan of green slurry, but the kiddos merrily kept playing.  Scooping and pouring and smooshing....  It was great fun and not to bad to clean up.  I think we'll be doing this one again.