Busy is a very busy 3 year old and often her emotions run high. We say she has a case of the really's. She gets really excited, really frustrated, really sad and really any other emotion. I saw this calming jar idea here and thought it could really work for her. We made it together while I explained to her that when ever she started to get a case of the really's, she could get the jar, shake it then watch the glitter settle to the bottom. We talked about how doing so would calm her emotions then she could continue to play or rejoin whatever was going on.
So far it seems to be working :)
*We also made a plastic container version which I would suggest for a classroom or for younger hands.