I have been enjoying some print workshops at college.
We were shown how to create a printing surface by gluing tin foil to a board.
Then you paint it with black acrylic paint or ink.
Use impliments / household objects to make marks on the surface (sponge, pegs, coins, nails, comb etc). Each time you make marks place a sheet of paper on top and rub over with a bunched up pair of socks (stops you ripping the damp paper)
When your prints have dried you can cut them up and collage them. We did self portraits.
Cheap, fun and messy!