My daughter Ella got diagnosed with Langerhans Cell Histiocytosis, a very rare cancer when she was 20 months old. She had a particularly tricky and dastardly type, leading to 5 relapses in 7 years. Luckily, she got teamed up with the stunningly clever, resourceful and wise Dr. Malempati and Company. They not only got her to her to see her last oncology visit at age 10, but helped her live a fun-filled, active and "normal" childhood in the years in between.
Here is a link to an old video as well.