international children's club (St. Petersburg)

does any expat have an children who are native english speakers?
im looking for some children to interact with my russian students. we want to start a childrens club, where children from all languages can meet and scoialise as we take walks, museum tours, picnics, etc. it will be something of an adventure club for the kids as we explore the city. there will parents and adult chaperones. its for about 3 hours on the weekend twice a month