This was the best idea ever!! I changed it up a bit though. I made one for each child. Not only did they get a rock for every wise choice, they had to take one out for every bad choice. This way they were individually rewarded or punished. It has really made them stop and think about the choices they are making. Works 100xs better than time-outs and threats.
Time out/calm down bottles- original source. If child is too excited or angry or agitated, give them their bottle. They shake it up really well & sit somewhere quiet. Once the glitter is all settled (~5 mins) their time is up. If they try to mess with the bottle, it will only make their time out longer.