It was excellent demonstration of energy efficiency. The kids could either power a compact fluorescent light or a set of incandescent light bulbs. The incandescent bulbs are on the handlebars and are not completely visible in the pictures I have. :-(
The generator was a 12V dc motor from Grainger. link
The incadescent lights were automobile headlight light bulbs. The compact fluorescent was a 12 V DC model typically used for RV's.
A big old capacitor (1 F) was also wired in to help regulate the voltage.
Message me if you have any questions.
Big thanks to everyone on instructables that gave me advice in making this project!