It’s been about 30 years since schoolchildren in Somerville created the artwork for a series of tiles - crudely drawn sailboats, rail cars, and clowns - that now adorn the Davis Square T station’s brick entrance wall.

Many commuters walk by without a pause. But a group of community arts organizers believes these 249 tiles tell the story of a neighborhood that has changed as much as any in Greater Boston in the 25 years since Davis Square got its own subway stop along the MBTA’s Red Line.

In April, members of the Davis Square Tiles Project began an effort to track down the people - now probably between 35 and 45 years old - who created the artwork to find out how their lives have changed and how they view the changes in their old neighborhood.

They want to tell the collective story of the community’s gentrification, with all the complexity and individuality that it entails, and start another conversation about the changes that may come when the Green Line extends into new neighborhoods in Somerville, and Medford over the next five years.

The work in progress, posted on www.davissquaretilesproject.com, is something like a reverse time capsule - coupling the ageless artwork of children with the words, insights, and in some cases photographs of the adults they grew into.

“How many people walk by those tiles and think they were made by some third-grader this year?’’ said Sabino Lagattolla.

Lagattolla, who drew a sailing ship under a beaming yellow sun when he was in second grade, is now a 38-year-old network engineer, living in Hudson with a wife, two children, and another baby due in November. He visits his old hometown with his family, to soak up the past and to stock up on steak at McKinnon’s Meat Market.

Lagattolla’s personal history echoes parts of the neighborhood’s transition from blue-collar working-class families to postgrad hipsters wearing pork pie hats in search of craft beers.

His father was a pipe fitter, his mother a seamstress. They all moved to Somerville from Southern Italy in 1972. Lagatolla remembers the community’s ills - the drug problems that plagued some of his neighbors - and a tight-knit spirit that allowed him to ride 15 blocks on his bicycle without worrying his mother. He only regrets that he could not afford to take over the house he grew up in when his father died in 2000.