Kids in poor neighborhoods have lousy bikes to begin with and they don't get any ongoing maintenance- the bikes some of these kids ride are just incredible- no threads on tires, no brakes...

I would like to get bike repair to these neighborhoods on an ongoing basis and am looking for models.
In one community I know, youth at the Boys & Girls Club fixes up old bikes 4 days a week and on the 5th day they travel to other clubs in town to fix up bikes. I really like this model. Are there any others out there to get bike repair to poor kids on a regular basis?

Thanks