I made some bubbles by following a video tutorial on youtube.
The video is called How to Make Bubbles in Gimp.
Anyway, here's my attempt:

Some very unique bubbles, I like them.

Thanks he4rty. Glad you like them.

I think I could use this technique to make the balls Christmas tree too.
Incidentally, researched and checked the video in http://youtu.be/M7G3gP-WTKQ

I think this technique can be done to create anything. I was looking for something short because I don't do well with long video tutorials. This 4 minute 14 second video seemed to do the trick.