Strange inventions often capture our imagination with their unusual designs and purposes. For example, the banana slicer is a simple tool that allows users to slice bananas quickly and evenly, despite the fact that a regular knife can accomplish the same task. This quirky gadget highlights how some inventions can be both amusing and unnecessary. Another peculiar invention is the pet rock, which was created in the 1970s as a novelty gift. It consists of a smooth rock sold in a box with breathing holes and a care manual. This invention became a cultural phenomenon, demonstrating how even the simplest ideas can gain popularity and commercial success.