Also, I am nearing the final day of my favorite holiday: the Fourth of July weekend! The weather here is perfect, and I am looking forward to our traditional chill-out-on-the-grass-of-MIT-with-friends evening. Until then, for my and your reading pleasure:
The MAKE magazine blog directed me to a sentimental how-to guide on building your own crystal radio. It made me feel like I was in 7th grade again, wrapping magnet wire around an empty plastic film cannister to make a no-batteries radio receiver. (Nerd!) Here is the article at sci-toys.com.
Digital Sundials (yes, Digital)
Over the years I've mentioned this to a few people. Here's a link to a company that makes sundials which yield a "written" image of the time, rather than a shadow of a pointer to the time. Check out digitalsundial.com.
Image linked from Digital Sundials International.