Looking for old 80-90 movie title?

I'm looking for this movie title of an old cartoon film, it involves some mice and a hedgehog needing to find some special flower for a sick squirrel I believe, and they end up building a flying glider that ends up getting struck by lightning while they are trying to make it back home. If anyone knows the title of that movie please post. It's been driving me crazy trying to remember it. =/