There was a great documentary on these a while back – it was under the banner of one of those “SECRET WEAPONS OF THE AXIS!!” shows on cable, but it was a terrific documentary about how clever these devices were and yes – sinister – I think five students got blown up by one in Idaho when one landed near a school.
Also, I love me some flying boats and my post-liquidity event (whenever or however that might occur) plan is to spend my days flying amphibious airplanes!