I played with Hot Wheels a lot when I was a kid, and I bet that at least a few of the people who read this blog did also. If you’re one of those people, imagine how cool it would have been to have a working traffic signal for your Hot Wheels.
The next obvious step is to create four syncronized sets of signals so that you could build a complete four-way intersection. Then you can teach your kids about running red lights, failure to yield while making a turn, etc.
[Thanks to Hack a Day for this one.]
