First I suggest Ghibli movies: Tonari no Totoro Laputa: kasteel in the Sky Secret World of Arriety Ponyo Kiki's delivery service Pom Poko Spirited Away (it might be scary for some children that age but still...) The Cat Returns My Neighbors the Yamadas Porco Rosso Whisper of the hart-, hart
Totoro will most likely will be their new favoriete Mikey muis
Others: Unico wolf Children Tokyo Godfathers Children who chase lost voices
Digimon Pokemon Sailor Moon DBZ Princess Tutu Astro Boy