This isn’t a real instruction but more of an inspiration. At Atelier Verena you can follow a class about recycling. At her website, Atelier Verena describes how to make your own recycled lamp (last item on page): glue two terracotta pots together, wrap them with fabric, use some fabric stiffener and paint it with acrylic colour.
I haven’t done it yet, but I think that you also can wrap the glued pots with paper mache or plaster of paris and do some kind of collage or decoupage or glueing interesting tissues an it and so forth.