It's not that difficult to make paper pulp at home and use it for a variety of different things. I made paper bricks for our fireplace when I was a kid and you can do that with homemade molds. In theory you can also sculpt with paper pulp, although I've never done that.
And, of course, you can make paper, although it's more difficult than it looks to make good paper from recycled pulp. It's definitely worth a try though.