This is Chubby Choo-Choo. I had the plans for this thing for several years, but not having any small children around I never bothered making one. My good friends had their first grand child, so I have been making things for him.
The Choo-Choo is a combination of maple and walnut. When the wheels turn the rods move back and forth through the barrels. It has a tung oil finish on it.