I’ve been hard at work building a bunch of Jam Jar Gelkies to bring to the Maker Faire in San Francisco this week. Here are four of them in action! Aren’t they cute?

In case you didn’t see my previous post about the Jam Jars, they are light dependent synthesizers housed inside glass jars. They are loads of fun to play, and if you’re at the Maker Faire you can play with them yourself!