Fire = electricity + charcoal
Frying pan = forge + cast iron
PS: I would never discover the drawings!
PS (2): How do you know what are the items you didn't discover?
PS (3): In the background image, there is something strange between bow and kite... What could it be?
PS (4): Have you noticed that there are ten different types of potions, each one with a different colour, and ten different types of dyes?