Introduction Have you ever played with a Slinky, used a pinball machine, written with a click pen or ridden in a car? If so, then you have made use of a spring! Springs are in machines all around us ...

We’ve all seen, and occasionally wrestled with, bill acceptors like the one [Another Maker] recently liberated from an arcade machine. But have you ever had one apart to see how it works? If not, the ...

Did you know you can measure an unknown mass with a rubber band? You pretty much can. The first thing you should do with any project is to play. So, go get a rubber band and play with it. What happens ...