Tell them how you really feel
Adults like stickers, too.
We just (unfortunately) don't have trapper keepers to put them on anymore. That's why we made this, a book of stickers designed to be used. We all get IN A MOOD sometimes, so use thus set of "emotions" to tell the world how your really feel.
Put them on your calendar, label your co-workers, or add a personal touch ro parking ticket payments.