BURRY PORT, Wales, Aug. 21 (UPI) -- A barnacle-covered buoy discovered by a pair of curious young children at a Welsh beach was later found to be a bomb from World War II.
Gareth and Kelly Gravell, who visited West Beach in Burry Port with their children, 6-year-old Erin and 4-year-old Ellis, said they did not suspect the item was anything other than an old buoy when their kids asked if they could play with it.
"We didn't take much notice of the buoy," Kelly Gravell told CBS News. "We were looking at the barnacles -- it was quite unusual."
It wasn't until a couple of days later when Pembrey Country Park officials determined the item was actually a U.S.-made bomb from World War II.
"So the buoy my kids were jumping on all weekend turns out to be a WWII bomb. Oops!!" Gareth Gravell tweeted.
A video posted Wednesday showed the bomb being destroyed in a controlled demolition by Royal Navy officers.
WATCH: Video of controlled explosion carried out by the Royal Navy at Burry Port HarbourGWYLIWCH: Fideo o’r ffrwydrad dan reolaeth gan y Lynges Frenhinol ym Mhorthladd Porth Tywyn - PCSO Sion MoorePosted by Pembrey Country Park on Wednesday, August 19, 2015
"It was a complete shock," Kelly Gravell said. "The story could have been a lot different had that gone off."
"In the future, we're going to approach [unknown objects on the beach] with care," she said.