Dean Walker, of Bethel, has an entire room dedicated to a model train village — a full scene in miniature. And at 92, he’s ready to pass it on.

Why now?

“Because I’m old. I’m 92 and it’s time to downsize,” Walker said.

The train room has been a centerpiece for decades. And how does his wife feel about the space?

“Priscilla is very, very supportive,” the former supervisory machinist at the Portsmouth Navel Shipyard in Kittery said.

And her hobby?

“She just takes care of me,” he quipped.

The Walkers moved to Bethel 25 years ago from Kittery, where space was tight. There, the trains only came out at Christmas, circling the tree.

Walker’s love of trains began at age 5, when his older brother, Robert, gave him his first set. Though mostly boxed up, the trains never left his mind.

“I was given a train at 5 years old and it just sparked my interest from then on,” he said.

“It was not until after we were married that I had it going around the Christmas tree in Kittery,” he added.

Today, Walker’s collection includes 35 engines — a few with working whistles — and about 150 rolling stock cars: tankers, coal cars and more. Ninety percent are Lionel; others are American Flyers. His O-scale trains span prewar and postwar models, with a few tin-plate metal pieces dating to 1928.

He stays sharp on trends by reading Classic Trains magazine and has repaired many of his models, as well as those of others.

While Boston’s trolleys “rattle rattle,” Walker said his trains go “clickety-clack all over the tracks.”

The village features hand-crafted details — a woodshed, water tower, food truck, lunch stand and produce stand — all built by Walker himself at quarter scale.

“Everything is within scale or else looks out of proportion. You try to make it as realistic as possible,” he said.

Walker updates the layout for three seasons: spring/summer, autumn and Christmas. A small sign on the train station reads “Bethel,” though it’s not modeled after the real one, which houses the Bethel Area Chamber of Commerce.

Over the years, he’s welcomed friends and school groups into the train room.

“The kindergartners and first graders are the best because they are all eyes,” Walker said.

Despite the detail and history, none of his three children, five grandchildren or four great-grandchildren have taken to the hobby.

He said it’s the village lights that bring it all to life.

“They give it character,” he said. “That’s what ‘makes’ it.”

A few years ago, he told himself to stop collecting and building.

Now, he hopes a fellow enthusiast — someone who truly appreciates the craft — will give the village a new home.

“It has to go all at once,” he said.