Raising Dragons: Smoking Bubbles Dry Ice Experiment
Raising Dragons

Dry ice might be one of the coolest substances on earth. 

https://www.raisingdragons.com/smoking-bubbles-dry-ice-experiment/
National Informal STEM Education Network: Sublimation Bubbles
National Informal STEM Education Network

In this activity, learners explore sublimation by capturing carbon dioxide gas in soapy bubbles sublimated from dry ice.

https://www.nisenet.org/catalog/sublimation-bubbles