Go for a sound walk…find a room in your house and sit silently for 1 minute (time yourself). What do you hear? Write down or draw and label all the things you hear (and the objects that they come from) – then think about which of those sounds come from something that has been invented.
Try different rooms in your house.
Do you hear different things in different rooms?
Try going outside as well. If you have a front garden and a back garden or different parts of your garden, try them all. You could even stop for a one-minute listen at different places along your walk.
You could research your favourite object to find out when it was invented and by who.