I remember a film from when I was younger I can't remember eny of the characters but it was animated and it was about 2 children I think running away from guys and they had a war balloon and its sad can enyone help me out guys?

2 kids (a boy and a girl) on the run from a group
A "war balloon"... maybe a blimp or dirigible?

Maybe,.

Laputa: Castle in the Sky

Thank you so much:D!