Mr. Achmad Djafrulah in Indonesia, used to be a sailplane pilot and hang glider pilot when he was younger. I think his pilot experience helped with this outdoor flying, which is more difficult than flying through very still air, inside. Achmad said that he would be teaching a group of 15 kids to fly. I wish him the best and hope to see more pictures and video eventually. Thank you for spreading walkalong gliders in Indonesia!
Pictures of Achmad’s walkalong gliders are here.
More about walkalong gliders: sciencetoymaker.org/airsurf/