Have you ever seen a video of something called “The Most Useless Machine Ever” ? Actually, this is really rather cool. I would love something like this on ...

The mechanical simplicity of this pull-string controlled most useless machine is delightful. You can see the metal gripper which is reaching up to tug on a light-fixture-style pull chain.

No, this isn't an instructional guide on how to build a TwitterPeek. This device is even more useless. Impossible? Hardly. Check out the video. Then hit ...

While no machine is totally useless if used properly, some just aren't terribly effective, says Lani Muelrath, MA, fitness expert and author of Fit Quickies.