The Story of Heidi by Johanna Spyri

Heidi lived high in the mountains with her grandfather. She loved the mountains and her friend, Peter. Klara, a crippled girl comes to visit and she and Heidi become quick friends. Peter becomes jealous and pushes Klara’s wheelchair down the mountain. Without the chair Klara is forced to learn to walk and with Heidi’s help she is able to walk again.