How to reveal subatomic particles at home | NOVA

Holy crap that's awesome.

Dry ice is a little tough to scrounge up in those chunks. Meijer and Graeters both sell dry ice. I know Meijer sells theirs in blocks about six or eight inches on a side and maybe two inches thick. I'm not sure in what shape Graeters sells theirs.

I also know that - in Cincinnati - Continental Carbonics sells pellets with (from the last time I was there in maybe 2012 or 2013) a ten pound minimum.