Start by collecting all the old papers that you have, from unimportant letters to old projects that are kept aside gathering dust. Look for papers in newspaper, magazines, office paper, and the likes, ...
CURIOUS CAT:Hello, children. What are you doing? BOY:We're making things out of paper. GIRL:Look, I made a paper hat. CURIOUS CAT:Wow, that's brilliant. Paper is really useful for lots of things.