Get the kids outside and create some Halloween art on your driveway and grass before trick-or-treat occurs. Try a ghost, a bat and a "trick-or-treat" sign on the driveway to invite dressed-up ghouls to your house.
Step 1: Shake well before and during use.
Step 2: Hold the can 4-10 inches from the concrete and grass and at a 45° angle for best consistency. Make it as large as you'd like!
Step 3: Spray chalk washes away naturally with rain, or lightly spray water from a garden hose to remove.