Here’s a nice, easy to follow, article on making your very own Sun Jars…
http://lifehacker.com/5315357/create-your-own-sun-jar-lifehacker-edition/gallery/
When I have some free time I’ll definitely have to try and make one, or a batch, of these things. They would be great gifts, or just something to put on the window sills in your home, so you would essentially have night lights through out your place. Make sure to look over the comments of the above article to see what other people did, as well as some useful tips.
If you would like to buy some Sun Jars, you can get them from ThinkGeek for about $25 to $30 each.