Here's how it works. Go to Target or the Dollar Tree or wherever and get an empty spray bottle. Fill it with water and if you want you can label it with the name "Cool Kid Spray." I leave my bottles unlabeled but always refer to them as Cool Kid Spray. Whenever you want to use it as a reinforcement bring out the spray.
My one rule is that you can't ask for it, you've got to earn the spray by doing something great. Cool kid spray is amazingly effective and totally FREE!!