A pond, and a dragon

Aaron is a 12 year old boy who lives in a house on a huge amount of property. There are some strange things on the lot, including a meadow in which he found an animal, a dragon, but dragons don't exist, do they?

PS: please comment constructive criticism and inform me about things that don't make sense to you. I know that there are some places in the book that don't make sense to some readers.