This is a 1:6 scale model of the batbomb that was tested during WWII. The "bomb" held 100's of bats, which had small incendiary bombs attached. These bats would have roosted in Japan, where the bombs would go off. This was the origingal item that was going to be use to help end the war. But the nuclear bomb was considured to be a cheaper method. So in the end, Project X-Ray and the batbomp were put to rest.