Blow It Up...

...and tie it off.

 

"A balloon can be defined as an inflatable flexible bag filled with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air. Modern balloons are made from materials such as rubber, latex, polychloroprene, metalized plastic or a nylon fabric," according scienceworld.ca. This one is made of latex and filled with air.

 

Crazy Tuesday: "Green" theme

Done