Step inside David and Julie Hohman's Wentzville home, and you'll see how much they love decorating for Christmas.

"You look to your left, there's Christmas. To your right, there's Christmas," Julie said.

That's just the first floor.

"You have to wait until you get downstairs. When you come down to our lower level and we've got Christmas everywhere. Just the most fun place for us to be," she said.

This magnificent 262 square foot train display is designed by Julie's husband David.

"A mixture of Lionel trains, MTH trains, Department 56 houses and people," David said.

It takes a month to build.

"6 to 7 hours a day," he said.

There are 8 running trains, 250 houses, and 1000 people.

By building the train display every Christmas, David carries on a childhood tradition.

"My parents started it and they did it every year," David said.

And for the Hohmans, it's become more than a tradition.

"It's an obsession," Julie laughed.

There's so much to see, the train display becomes a game of Where's Waldo.

"One of my friends used to look for a wet paint sign and a butt print on the bench," Julie said, referring to one of the pieces.

In front of every church is a couple getting married.

"I don't know why, just something I started doing," he said.

Even though the the train display takes so long to put up, it comes down the first week of January.

"I think it's a Christmas thing. Something special that happens at Christmas," he said.