Color sheets & stickers are fabulous take-home reinforcement tools. These are a great way to communicate materials learned in class to the paying client, the parent!
They can also be a wonderful part of behavior-management. Bribery is not beneath us! ;)
In addition, they'll be great at your next marketing event. Hosting a booth at your local fair? Passing out studio information at a nearby school? Color sheets & stickers are sure to capture the imagination of a potential future student!