I found the K-Tor Generator while looking for a cheap generator for a project I’m designing. You can buy these on Ebay for about $30. In a video, the creator states 60 watts can be produced.. but then states you can’t power a laptop off of it. It has a built in invertor so that 110 Volts AC appliances can be charged.
I’m going to buy one! http:\\www.k-tor.com
Here’s a video of it in action.