I want to hack my bicycle

Design opportunities are aplenty here on this sunny island if one pays close attention. And I think that bicycles does present a lot of it. Just last week after having encountered the Leaf-kite, I saw an interesting add-on to one of the bicycle that was locked at the park there. Its owner had wrapped the center part with a stretchable netting. This then had created compartment that is big enough to put small items in.What I could imagine from this are bicycles with designs that utilizes its central portion fully. It could be a small compartment to put files or books in when commuting within the campus.