It goes without saying that weather forecasting is far more important than simply letting people know whether to take waterproofs and an umbrella out with them.
I'd invented an automatic gate closer out of cement-filled tires, a solar cooker that didn't work very well out of an umbrella and tinfoil, baking-pan alarms to entrap my siblings.
One problem here is taking out everything that shouldn't have been placed in the recycling containers: people put all sorts of things into bottle banks, like plastic bags and even broken umbrellas.