No. I think it's insulting to the kids' grandmother who actually cares for them that he calls himself their father. He sends $35 a month and never sees them or does anything for them. He doesn't know what it's like to be a parent, and it's very immature.
Wait... these kids live with their grandmother, not at the Maisha orphanage?
Yes. Go back and read the earlier Update thread, circa spring 2012 or whenever it was after he came back from Kenya. They live with the grandmother, but they have no money, so they get their financial support from the orphanage.