Remember, blue does not mean inert…
So a guy in Massachusetts got to looking at his grandpa’s old military souvenir, which everyone just took to be a keepsake.
Then he noted the bomblet had a charge inside.
From the video, the device looks to be a WWII-era AN-MK23 Mod 1 Practice Bomblet of the type used by the Army Air Force and the Navy and are made to hold replaceable spotting charges, a special 10-gauge shell with about the explosive power of a blasting cap. The light blue color, officially “Deep Saxe Blue” denotes practice use and not totally inert devices.