Butterflies and bees kept getting trapped in my greenhouse, so I needed a way to stop them flying in. My sister Tracey collected a lot of bottle tops for me. I made holes in them with a screwdriver, before threading them on to lengths of string. Finally, I tied the strings to a cane which I hung in the doorway to create a blind. Now the butterflies flutter by!
Karen Heath, Sutton in Ashfield, Notts