Ah, science experiments. What's not to love?
I set this experiment up in three stations on the long table. At one end I added baking soda to a tray and set out cups of vinegar with pipettes so the children could work as a group.
At the other end I set up individual cups of vinegar and baking soda.
I also set up bottles of vinegar as well.
After the children began using the pipettes I added watercolor to the vinegar so they could see the reaction better. The colors were lovely, but in retrospect I would have used only one color so they could focus on the reaction.
Some of their thoughts:
A: It's like pop cuz it gots bubbles.
K: It reminds me of the color of paper
E: It's bubbling up.
M: It's burning.
K: It doesn't work any more.
S: Bubble, bubble, toil and trouble!