Trips for Kids is a non-profit organization that arranges for bicycling trips for kids that are at risk. Each chapter has its own set of rules and ages they allow to participate as well as type of terrain they cover. Some are mountain bike rides while others are focused on city riding. While doing my research, I found that Trips for Kids has a presence in many cities across the US and Canada. Mind you, there are not as many in some of the northern states currently but they are adding more to the website as chapters open up. Most chapters that I found request that you join the chapter in your area and then they set up bike events in which they provide the bike to be used by the youth during the ride and the ride event. For many kids, this is a wonderful way to get them out of the house and provides a positive and fun interaction with the adult volunteers.
If you know a family in need, please pass along their information.
http://www.tripsforkids.org/