I read about the "super foam-erator" on Betz White's blog a few weeks ago. I thought it looked crazy fun, so we gave it a try on a free afternoon at Mom and Dad's house.
It was a blast and like nothing I have ever seen before. (That's Lake Ontario in my parents' back yard.)
You can see the details here: empty bottle, old wash cloth, rubber bands, water, dish soap. So easy.
If you want to try this, Benjamin would like to advise you: Do Not Inhale. Only Exhale Into the Bottle.
The bubbles floated all over the yard and disintegrated into shiny blobs.
Isn't it great to have fun with a toy that you didn't buy at Target and does not require batteries?