Tonari no Totoro, Hotaru no Haka Recommendations
Both are about children which strive to be happy and loose parents - though in the GOTF it's much more tragical, girls in MNT are worried about their mother too. Both let you enter the world of kids, which is a good and interesting thing. And both have deeper meanings and very nice visual part.
Just wonder why there so much reccomendations but no obvious parralel between classic animation movies.
This both about spirits, miracles, and special mood around.
You definately will love it.