The area was cordoned off and the bomb disposal squad destroyed the grenade in a controlled explosion, police said. It also resulted in the closure of a highway for a few of hours.
"We were beginning to count up the eggs at the end of the hunt and I saw a boy of three standing on an object," Stuart Moffatt, who was attending the hunt with his three children, told the Daily Mail.
"It was brown and about four inches high. It looked like an Easter egg, but it was a hand grenade.
Officials believe the grenade may have been left over from World War II. Link -via Breakfast Links
(Unrelated image credit: Flickr user Corey Holms)
I strongly suspect the kid found a Mills Bomb-type grenade which looks even more like an Easter egg. http://en.wikipedia.org/wiki/Mills_bomb