We have a range of sand timers, these are all made from recycled bobbins (from English wool mills) The wood is at least a couple of hundred years old, with beaten pewter around the rims.
The smallest is 3 minutes, the rest on the lower shelf are 5 minutes, including the taller ‘bubble’ timer where the sand-glass itself raises to the top, whilst dropping sand. On the top shelf they are all hour-glasses (with black sand in case you are a pirate)
So why the title?..
Well, the five minute timers are sometimes bought to time children on the ‘naughty-step’; but I had one lady who bought an hour-glass for the same purpose!