My 3 year old has a habit of not eating her dinner. It's been our policy to tell her if she's not going to eat, she can just go to bed. Sometimes she's happy to do that, so we wanted to further discourage the no-eating behavior by saying if you don't eat your dinner, you can't have a snack the next day.
So, we ended up making a little fridge magnet with a red side and a green side (since she knows colors and what red/green mean) and if she eats her dinner, we will turn it to the green side so that the next day she can look at it, know she can have a snack that day, and associate it to having eaten the night before. and of course, the opposite for not eating. She's picked up on the concept very quickly.
Is this a good technique? Part of me feels there's something about this that is going to backfire, or end up contributing to some negative behavior. Anybody tried this before? Anything in child psychology studies?? If it works for dinner time, could the same technique be used for other things like taking naps, cleaning room, etc?