A fun free thing to do with your little ones is to encourage them to enter contests. Free colouring contests like this one offered by Zellers are great and fun. What kid doesn't like colouring?
Hint: This worked for my daughter when she was little. I used to supply extra materials to add texture to her colouring page.
Supply bits of green wool (for the grass), or cotton balls (to make a fuzzy bunny), or glitter for a radiant sun.
Mothers/dads, just supply the material. Let your little ones create. This helps their colouring page stand out from the rest.