Jean Ulrey in Florida has a bicycle trailer to tote her granddaughter around, but the little girl kept getting dirt, grime and water in her face.
Besides the flap that comes with every bike trailer I've seen, an obvious solution is a fender. So Ms Ulrey, who owns a welding business, built a bicycle sidecar to carry her granddaughter.
According to this news article, Ulrey hopes to sell her sidecars and even patented the idea of attaching a sidecar to a bicycle.
More. Props to Warren, who now publishes a "Bicycle News" daily podcast.