Stricter gun laws? Try a light saber.
Most of Star Trek and Star Wars technology might seem far fetched, but you will be surprised how many modern gadgets resemble something we once only knew from SciFi movies. We have communicators (cell phones), spaceships, plasma drives, lasers and we even start to understand the principles behind transporters.
For many Star Wars fans the coolest gadget is a light saber. Yes, you can buy them, including a Darth Vader outfit, but the stuff can’t even harm a fly. If you really want to slice a burglar in two halves, you have to build your own version. All you need to do is salvage a 3 Watt laser from a DLP projector and put it into something resembling a light saber.
May The Force be with you.