Here's a new sub-category: vehicle toys which feature helicopters. One company in particular, K (Kanto) in Japan, produced a few different variants on this theme.
Here's the more common "Army Duck with Helicopter and Ack Ack Guns" variant:
This Kanto Army Duck in a camouflage pattern is a lot harder to find:
Finally, here's the Kanto Anti-Aircraft Armored Car, also made in in fewer numbers: