Cancer can be a scary topic for any age, but especially children. This book Maw-Maw's Favorite Color is Pink is a great tool and good length for younger children. Even though this book mentions breast cancer, it is set up in a way that it can be a conversation starter for any type of cancer.
In the book you meet a young girl and her little brother navigate the changes around them when their grandmother is diagnosed with cancer. You will explore the open conversation with their parents lead by a very inquisitive girl.