Bicycles, cars, buses, planes (if you can see their wheels), motorcycles, scooters, skateboards, rollerblades even ... transport modes with wheels ... put yer kid in a shopping cart and take a picture, for instance. The First Catch: The photograph must contain the wheels. It/they do not need to be the center of interest or the subject of the photograph, but they must be evident in it. The Second Catch: The photograph must contain a description that is at least two sentences long. Like a blog. If you can't think of anything "bloggish" to write, find a good quote ( at Bartleby for instance) which is just as good. Descriptions may be posted with the project.