@engadget mentions that a new project dubbed "Flyfire" at MIT is looking to launch a fleet of LED-equipped micro-helicopters and coordinate them in synchrony to create massive floating images. "By using LED-equipped drones the project pledges to build free-floating 3D displays, endowing them with enough smarts and positional awareness to organize themselves into an airborne canvas. It sounds deliciously exciting and challenging."
I've never been canoeing before, but I imagine there must be just a few
simple heuristics you have to remember...
Yes, don't fall out, and don't hit rocks.