Paper is easy to find and re-use for lots of fun crafts. One of my favorite things to make are pop-up cards and books.
My Vonnegut Pop-Up Card Front
Vonnegut Pop-Up Inside
The Musician (Inside)
A few pages from a Pop-Up book in progress:
Here is another paper idea. I call this a story box. Images pop out of the box when you open it and tell a visual story from top to bottom. Here is one called Monster Love.
Here is a Story Box called The House: