Colleagues of Dyrk Burcie's firefighter dad organized photos with the 4-year-old's name and a message to cheer up the boy and his family as he fought cancer.
Dyrk's battle with the disease ended Monday.
Dameon Burcie says his son died Monday morning at the family's home in Dallas.
The boy's funeral is scheduled for Friday at First Baptist Church of Midlothian. He will be buried at Mount Zion Cemetery near Midlothian, 30 miles southwest of Dallas.
The Dallas firefighters' photo project caught on with crews at other fire departments, who also posted images on a Facebook page devoted to the child.
One photo had Dyrk's name spelled in fire, another in uniforms.