Hello,
Maybe you could start by showing photos of inventions that students already know, objects that we use every day, etc.
Then you could ask questions like: do you know when this was invented? do you know in what country it was invented? can you guess the job of the person who invented this?...
Try to use the students � answers to continue and then give them the complete information.
I think it would also be nice to ask them to do research on the internet.