This year's guide features four electronics gifts that are so much fun, your kids won't realize how much they're learning. For the grown-ups, we offer the world's geekiest clothing and accessories; the sexiest computer mouse, and a pocketknife that gives new meaning to the word
switchblade. And for audiophiles of all ages, there's a musical recording studio on the cheap and a line of headphone amps that reveal not only the colors of your music but also your taste in color.

There's no better way to encourage a kid's inclination toward electronics than with a holiday gift. The trick, of course, is finding something that's fun.

If T-shirts can come in 11 colors, why can't headphone amplifiers?

When your studio is the Internet, you're your own recording engineer, but Mantis offers a lot of help

Quirky's shape-shifting Switch is the world's first modular pocketknife

When you need a portable 3-D gaming computer, Lenovo has the right idea.

The world's fastest computer accessory, racing stripes not included.

Sweaters, hoodies, socks, ties, wristwatches, earrings, cuff links, and of course, T-shirts: a roundup of the best in wearable geek gifts.

Amazon's third-generation e-reader provides a much-needed fix for Kindleholics.

A new in-car stereo and navigation system from Pioneer Electronics makes even tinny MP3s sound sweet.