WHAT WE'RE MAKING? KID'S PLAY CHALK PAINT

My 5 year old asked if he could paint the tree house. Why not?! It will wash off.

I wanted something that would wash off and was cheap. These are probably ingredients you already have. 

Mix together:

1/2 C corn starch

1 C water

food coloring

Paint the sidewalk, fence, tree house, etc.