Here's one inside picture:
http://www.flickr.com/photos/lenore-m/2463024051/

I have two genuine Wham-O SuperBalls: pictures here and here. Yes, you can still get them at good toy stores. And they really bounce better than knock-offs - excellent stuff, that Zectron.

Thanks to Jimwich for the salute - I feel a little better now.

Most of the bicycle sound systems I have worked with have been trailer-based (thus avoiding the need for additional suspension) usually with an ipod on the handlebars. I know of a couple of sound systems built on the xtracycle (fossil fool in SF with his soul-cycle is a good example) and some that simply hang off regular racks and baskets. The best of all are the old am radios built for bikes. None have been quite as powerful as those in the NYT article, but some of them are downright beautiful. And even a bare-bones stereo on a trailer is enough to make the party go.

My title (but not Cory's; he put it in the main text) included the phrase "more anatomically correct." And given that last year's bat costume had the umbrella ribs coming out of my armpits (a la Acme), it is now more anatomically correct. I certainly mean no offense to all of the wonderful bats out there, and would like to encourage increased anatomical accuracy in all future bat costumes.