In these days of liability and lawsuits, I think an actual Penguin trainer would be a disaster waiting to happen. On the other hand, something like an adult-size toy plane on a gimbal with an electric motor and propeller up front that would give a little of the sensation of aerodynamic control could be a lot of fun. The old Link Trainers were actually quite complex electromechanical contraptions, but something more like the Paris rooftop one in my previous post would be quite doable.