Money was tight when John Romero was growing up in north Denver. His mother would walk with him and his three siblings to the Denver Santa Claus Shop, where low-income families have been receiving holiday gifts since 1931. Romero never forgot the joy of playing with an electric train set he pulled home in a red wagon when he was seven. Now he’s a senior property manager for Regency Centers, a real estate company, and when he learned the Denver Santa Claus Shop needed a new place to host its annual gift shop, he offered the use of a vacant retail space he manages. Hundreds of volunteers will distribute toys to needy children there this week, and some of the kids just might grow up to return the favor.