A local NGO working with Gonder street kids. It has an orphanage and also provides educational programs for the town's children as well as medical facilities. Following the success of Hope Enterprises in Addis, Yenege Tesfa also sells meal tickets that you can distribute to the town's street children. Tickets are available from most of the bigger hotels for Birr0.50.
It also actively encourages tourists to visit some of its project sites. Contact it in advance if you're interested in doing this.