Doing Science: Foaming Pumpkin

"EWWWWWWWWWWWW" "It looks like barf" "It stinks!!!" "COOOOOOOL!" "I want a turn!" 

You know it's a successful science lesson when you hear any of the above comments. On Friday, we mixed baking soda and vinegar to make foam come out of a pumpkin's mouth.

• First, we carved the pumpkin. We took turns removing the "gunk and seeds" from inside the pumpkin. Then, we voted on the shape of the eyes, nose, and mouth:

• Second, we took turns adding baking soda to a cup:

• Next, we placed the cup inside the pumpkin and poured the vinegar:

 

• Finally, we watched it foam!!!! My favorite quote was, "The pumpkin is puking!!!!"

I was hoping for more foaming action, but the kids still had fun! I hear that if you add dish soap to the mixture it will bubble more. Has anyone tried it?