Complex sentence: Beit Alfa, Sarid, Mizra and Merhavia, later joined by children from Kibbutz Gan Shmuel and youth from the Youth Aliyah.
Split into simpler sentences: Beit Alfa, Sarid, Mizra and Merhavia. They were later joined by children from Kibbutz Gan Shmuel and young people from the Youth Aliyah.