Anyone know any miniature medieval stuff and how I can make them?

I'm making a miniature Gypsum Medieval Town for a hobby...Anyone knows how to make medieval miniatures,working ones would be nice,like Ballistras,Catapults...Or how can I make something like a keg out of stuff i can practically find in a Supermarket orso?If you know any videos or websites about such stuff please tell me :D...By Miniature I mean like a Lego Figurine size..thank you!