So I have forever been wanting to play a dragon in DnD who doesn’t right. Before my 3.5 group fell apart I got a DM to agree to the Tome Wyrm from min/max boards using Savage Species to make monster classes. But lasted 3 games before we closed shop.

Well Mr.Rhexx actually has a dragon class done in one of his splatbook. Here is my idea

Green dragon whos entire clutch it came from was cursed to never grow beyond hatchling by age. To only grow by experiencing the world. This green dragon was the only of its clutch to survive and was taken in my a Druidic sect in the woods it inhabits. Jump forwards to present day. Dragon is a few hundred years old but still basically a dog sized dragon. It leaves the sect and begins to adventure and slowly begins growing.