Totally cute idea to do something with all those small sentimental toys that the kids (okay or you) don't want to get rid of but are never played with anymore. This way they still have them and the toys are hanging on the wall - out of the way. :)
I made these calm down jars for my classroom Take a Break Kits last year! Original pin:LEGO Calm Down Jar - Lemon Lime Adventures. I used Voss water bottles (cylindrical and plastic! These jars were a huge hit across grade levels!