German Post WWII Childs Game

German Post WWII Children's Game. Made from two WWII gasmask lenses glued together, on one side is painted usually a birdhouse or caterpillar and within the lense frames are 2-3 BB's which you try to get into the indentations. A great example of swords to plowshares as the German economy tried to get on it's feet again after WWII.