A lot of you probably know this trick for chalk drawings - dip the chalk
into a bit of milk before drawing with it - softens it, makes an
interesting line, and it's not as messy as the white tempera paint.
I suggest this only if your school saves the cartons of milk that students
DO NOT open and drink. My school saves these at breakfast & at lunch,
they're used for recipes or thrown out if they expire [or used by the art
teacher for drawings]. Remember, I'm talking about the unopened cartons.
Just another idea...
(also de-lighted by all de-talk of de-nile)