You might be thinking of an animated version of the movie, "Heidi". It's a great movie, sweet and inspiring.
Cute movie, but totally paints disabled women in a bad way. Most of us are more like Heidi in personality (witty. Creative, brave), not Clara (the bitter, crippled one) Just try to keep an open mind when you watch it.
THE THEORY OF FLIGHT released in 1999. That is the name that came to my mind after reading your question. I hope this is the movie you are looking for.