A diving friend gave me a 2 litre tub full of cordite a few years back. At a loss as to what exactly to do with it I mentioned it to a mate who turned up next day with a 3' long scaffold tube, with a touch hole drilled in at one end and a cap welded on behind it. We spent a happy, summer Sunday evening firing King Edwards across Falmouth.

Watching that lot has now got me thinking about stuff I could make with my kids. Great fun being daft, isn't it?!