Comment Game Worlds (Score 1) 121
If you happen to live in central Texas, Game Worlds runs Summer Camps in Austin that teach kids how to make games: http://gameworldscamp.com/
The kids mostly use Construct2 ( https://www.scirra.com/ ), though we also introduce them to Stencyl and Unity.
Full Disclosure: my wife is the owner and director of Game Worlds, and I've developed and taught a lot of the programming curriculum