Finished reading this to the kids tonight! Here are their review:

Eleanor age 7: Clay is a great hero and Starflight is very brave. Starflight learned that his friends care about him even if they thought he’d left on purpose. In the end he learned his friends believed in him. My favorite characters are Clay or Sunny.

Max age 10: My favorite part was the eruption and those chapters. Starflight learned he was braver than he thought. Whenever they talk about huge libraries in books it really makes me want to go to one. My favorite character in this book is Starflight, and I relate to him a little because I also like to read a lot and I might braver than I think.