All inventors have their ups and downs.

Thomas Edison wanted to make pianos out of cement and Henry Ford tried to invent a nuclear car. Popular Science recently went through their 138 years of archives to find the insanest inventions on its pages, and now they grace us in gallery form on their website.

For every airplane, computer or chemical weapon appearing in our archives, there are a ton of other inventions that are, to put it bluntly, rather pointless. At best, they’re well-intentioned but a little impractical. Let’s take a look, shall we?

Don’t miss the magic of the combo piano-vacuum, because really, everyone likes a mash-up and the only way to improve a vacuum is to make it stationary. But I guess you could always use it to clean the piano itself.

Some of the others are more reasonable, like a dog-wheel powered bike (don’t say you haven’t thought about it), which PopSci explains in the gallery:

The so-called “Poochmobile,” invented by eighty year-old dog trainer Z. Wiggs, applied the squirrel cage principle to its primary ...