Make your own portable hot packs
The dust can wait, it’s time for a frosty one
Downsize your pocket cargo with a custom-fit keychain
Give your desk a little retro-tech vibe while cleaning out the old office junk drawer
Why recycle when you can reuse? Editor Mike builds a Smurfberry Crunch spectrometer
Trash those CDs? Never! Let Bjorn and his 5-minute dumbbells pump you up
A step-by-step guide to getting YOUR projects on Popsci.com
Trick out your iPod three ways with Doug's handy guide
Clear the clutter without losing power
The prescription for a sick CD? Toothpaste, MSG and wood polish, of course
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