Every now and again, somebody comes up with an idea that makes every fibre of your childish-being tingle with excitement... as someone who spent many a childhood (& adult) hour in the manufacture of paper aeroplanes, this is just such a gadget :0)
Amazon.com) consists of a capacitor that clips onto the plane's nose, which is connected to a rear-mounted propeller via a carbon fiber shaft. The capacitor takes a 20 second-long charge from a separate battery pack, which contains three AA batteries. One charge provides enough power for 90 seconds of flight. That's probably plenty of time, considering that users presumably have to chase after their powered paper planes in order to get them back! Visit the manufacturer's website for more details on how to best-use your flight pack.