Amazon.com description: Product Description: Merry Mary Monoplane is the newest of Arnold's and Herman's friends. She is a beautiful little monoplane who always seems to be very happy even though she was made with a disability and has endured many visits to the mechanic. She has a small oil line with a big problem but is still able to live a great life and help her friends. In fact, she saves the day for Arnold and Herman who are destined to get a bad grade in flight school until Mary decides to help. My hope is, this little book will encourage children, who are afflicted with a serious disability or limitation, to concentrate on the many wonderful things they can do rather than on the few they can't. Mary says: "If you have a big problem you don't quite understand, don't think of the few things you can't do, just think of all those that you can." Herman also demonstrates how to be happy rather than jealous when a friend does well.