Subject: Why did tempera paint and Kool-Aid react?

My preschool teacher tried this experiment and was surprised at the reaction.  
She put some water-based liquid tempera paint in a cup, then sprinkled Lemonade-
flavored Kool-Aid over it.  It immediately foamed up.  When the foaming stopped 
she was left in the cup with what looked like colored water and a white glob of 
something.  It was kind of rubbery, like Silly Putty, only a little thinner.  
It was full of holes, like a sponge.  I don't know what's in liquid tempera 
paint.  But, the Kool-Aid has: Citric Acid, Calcium Phosphate, Maltodextrin, 
Salt, Natural flavors, Lemon juice solids, Ascorbic Acid, Artificial color, 
Yellow #5 Lake, Yellow #5, and BHA.  Can you tell me what happened? (By the 
way, my daddy is writing this for me.)  Thank you!

Re: Why did tempera paint and Kool-Aid react?