"We know he's going to pull through, it wouldn't be Rowdy if he if he didn't," Samantha Hansen, Radford's aunt, told KPRC.
Another boy, a friend of Radford's, suffered less serious injuries, according to KHOU-TV.
Radford's mother wants her son's gruesome fireworks experiment gone awry to serve as a lesson to others.
"I just want this out, I want everybody to see this so they'll know what happened, don't let their kids do this. It's not worth it," Wendy Smith, Radford's mother, told KPRC.