There are many prizes to be won in this year's Halloween contest, but we know you're most interested in the big kahuna: The Tech Grand Prize includes a $250 Shopping spree at the Maker Shed Store, a $250 gift certificate to Plaid Craft Express, and a $100 gift certificate to Hack N Mod. So get your tech tools out and start impressing the PopSci.com judges (that's right kids, we're in on it)!
If you need some inspiration—you know, to get the blood flowing—check out all of the entries so far. We like this Creepy Cobweb Shooter.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.