Here they are constructing a train track. Grayson wanted to take the old one apart and build a brand new one. Correction, he wanted Nienie to build a new one, "a really big one", he said. Morgan is busy picking out just the right train.
You can see the beginning of the track in the photo above, then we (I) continued a long stretch in front of the fire place. They had so much fun watching the trains go around and around.