Get the songs out of their heads and onto the driveway in a larger-than-life piano keyboard created with Testor's Spray Chalk. Make it as big or long as you'd like and use your feet to dance out an imaginary tune.
Shake well before and during use. Hold the can 4-10 inches from grass and at a 45° angle for best consistency. Make it as large as you'd like!
Spray Chalk washes away naturally with the rain, or with the pressure of a garden hose.
Layer when wet to create new colors.