This trains got the disappearing railroad blues

So, I had this great idea. Lindsay is getting in to Joel toys, so we needed to move them to his room. His room isn't big enough for a table for his train. So, I decided he needed a "train trundle". A platform, on casters, with handles, that was big enough for his train but small enough to fit under his bed. I suggested covering it in denim. Voila! Mike built it in a day. Here's the final product: