Soap Bubble, 肥皂泡泡

A child stands inside a large soap bubble made by a street artist at the Mayor square in central Madrid, Friday, December 9, 2016. (Photo by Francisco Seco/AP Photo)

Soap Bubbles

http://avax.news/fact/Soap_Bubbles_04-01-2017.html

Soap bubble - Wikipedia

肥皂泡