He showed a picture of the pipes to someone at home, who remarked they looked like a bomb..
The Philadelpha Police Ordinance Disposal Unit was called out to investigate around 11:00 a.m. on Thursday. The boy's home was evacuated.
Police say it was a counterweight, a commericially made construction item. Investigators add that this may be a practical joke that may have been played on the boy.
If the person who pulled the joke is found, they may face charges.
