If you’ve decided to purchase paint bundles from The Sensory Path™, the pre-assembled bundles have enough paint for at least one iteration of the stencil set. You may have some extra paint in some colors. Each can of paint covers approximately 20 square feet.
If you’re sourcing paint on your own, a gallon will cover approximately 200-foot space. If you are using black on the concrete area, it might take several coats, so may take a little more than that for a large area. A quart of paint will cover about 100 square feet.