(I should note that these drawings and Lego scenes might kind of be spoilers, so wait if you haven't yet read the books!)
When my son is enthusiastic about something, he often kicks into long stretches of drawing or building Legos related to it. He asked me if there are any Wingfeather Lego sets, and when I told him there were not, he opted to make his own. He was sure that Andrew Peterson needed to see these, and that these sets should definitely be manufactured! :)
First, when we were doing book reports for our homeschool co-op, he made a promotional poster for the first book. He doesn't always take a lot of risks and usually asks for a coloring page of a subject before he'll start drawing it. We ended up printing out a couple of the illustrations from the Wingfeather Saga site (Pete on Nugget, the toothy cow, and the Fang). Once he had those, he actually sat for a long stretch of time looking at the drawing in book 2 of Pete's tree house and drew it on his own.
One of the first things he wanted to make was giant Nugget. Since he wanted it to be much bigger than the usual minifigures, he built it and tried to make a head.
Here is his drawing of Artham and the sea dragons fighting off Fangs on the Enremere.
These are the minifigures he put together. From left to right: Leeli, Durgan guildling, Janner, Bat Fang, Bat Fang, and Green Fang.
He spent quite a lot of time on this scene. It is the Glipwood jail (with Janner) and the Black Carriage with a Green Fang driving.
Just a few things he's been creating as he gets engrossed in the stories. He also is building Chimney Hill but doesn't want me to take a photo with it not finished. :)
Oh, and I'm adding his Gnag-Dragon that he just finished.