What is the fine-grained topic of the following text: A piece of work in one hundred parts, one hundred rather fast pop art flavoured paintings painted on recycled cardboard, each part of the piece for sale at just £1, and that is a very important part of the piece, the notion of art for everyone, that an original piece of art can be bought by anyone at the fair (I did get haggled down to 50p last year by one young lad who claimed he only had £1 left) and that material thrown away and heading for landfill should be re-used. Only return the topic.
Selling affordable pop art paintings on recycled cardboard