My favourite projects are those that use everyday things and don't require special equipment or supplies. There's something MacGyver-esque about being able to transform a common item into something special.
Case in point: paper. Although it is a broad category and can be hard to source (if, say, you are looking for 17th-century Dutch hand-marbled paper) I think most of us have a few sheets of tissue, cardstock, or coloured paper tucked away somewhere that could be put to better use.
Looking for more inspiration? On my first visit to the Guggenheim Museum I saw these incredible pieces by artist Yuken Teruya. Using ordinary (and often disposable) materials, his works highlight social and environmental issues. Paper ingenuity, indeed.