Frothy Chunky Foamy Green Stuff

Guess what I did at school today? I ate a big chunk of green sidewalk chalk! It was a very interesting experience. No one was too worried because it was non-toxic, but they didn't let me munch it either. I just sort of chewed it up and felt the chalky flavor as I looked, curiously, up at mom. Mom sorta flushed my mouth out with lots of water after fishing out the chunks. I wonder if I might have to try it again?