Skyland Season 2 Episode 8 The Island of the Child Kings

Mahad and Lena discover an orphanage run by children. The oldest child Lukas is the self proclaimed leader. Charismatic Lukas suffers from the classic "Peter Pan" syndrome -wherein he never wants to grow up and has imparted that philosophy to the other kids. Because Lukas and many of the other children are Seijins, of varying degrees of power, the Sphere has planned an attack on the orphanage to capture them - and that assault is about to happen just as Lena and Mahad stumble across the island themselves.