THOMAS PATRICK CULLEN III, 31, of New York, a firefighter for the New York Fire Department, would wait until his 2-year-old son and namesake would go to sleep, then rearrange the toy train track in the family living room. ``He wanted Tom to be excited when he came downstairs every morning,'' said Cullen's wife, Susan. ``He spent his day thinking about how he would design it. He would always say, `I can't wait for Thomas to go to bed. I have a good idea for a new track.'''