About 40 homes were evacuated Tuesday morning after a county worker found a 2-foot-long PVC pipe with wires attached to a battery.
Nearly six hours later, a Hillsborough Sheriff's Office bomb squad concluded the pipe was not a bomb _ just something made to look like one.
Robert Helms, a 12-year employee of the county's water department, discovered the device while working in the dried-up retention pond behind the 800 block of Windsor Circle.
He called 911 at 9:44 a.m.
Homes were evacuated and nearby Limona Elementary School moved about 150 students into the media center and cafeteria as a precaution.
Limona students who normally walk or ride their bicycles had to take a bus or wait for their parents to pick them up.
Investigators don't know who built the fake bomb or why. Neither did neighbors such as 50-year-old Jean Hiller.
"All the kids in the neighborhood, we know them, we've never had a problem from them," Hiller said. "Who would think of making something like that?"