On this topic: I recently learned that if you possess a soldering iron, you have all the tools you need to weld plastic!

Since a lot of household objects are made from plastic (or partially plastic) this is extremely useful. I had a couple bike lights where the plastic clip had broken at a stress point. Instead of having to throw them away and buy new ones, I just plastic-welded them back to functionality.

I did a rough and ready job without regard to esthetics - the results work just fine for me - but if you want to do it more thoughtfully here's a blog post on how: https://www.circuitspecialists.com/blog/welding-plastic-with...