A bomb disposal unit from RAF Wittering was called to a family home in Norfolk over Christmas when a present unearthed an unexploded device.
Seven year old Sonny Carter from King's Lynn was using his new metal detector when he made the discovery.
Sonny was testing out his new toy on Roydon Common near King's Lynn with dad Jem and brother Marley when it started bleeping.
In the ancient surroundings of this nature reserve it could have been any number of items.
When a bomb disposal unit from RAF Wittering arrived they discovered it was a 10lb practice bomb from World War Two which, fortunately, had no explosives in it.
Nevertheless, that debut discovery has certainly set the bar high for future expeditions. Who knows what they'll find next.