I had some planes that were like this - very rudimentary, and if you looked inside you could see the product packaging they'd recycled to make it.
I would not go as far as saying that this cute little Midget toy is "rudimentary". But, hey, what's the heck.
Fairly few postwar Japanese toys were made from recycled packaging. This packaging came from... the US military. After the crushing defeat inflicted by the US armed forces to Japan in 1945, the victors acted very differently from the usual past conquerors (from Attila the Hun to the Chinese, VietCong or Soviet communists...), and instead of raping the women and looting the country, or in the case of the French after WW2, punishing the German economy to the point of strangling it, the supreme allied command under General Mac Arthur helped revive the nation's industry, based on export. The toy industry was one where they paid lots of attention, and since tin sheet was virtually unobtainable, large amounts of bulk food cans used by the US forces and also distributed to the Japanese population were recycled into toys after a process of cleaning and flattening.
By 1948, sheet steel was again available and there was no longer a need for processing used sheet metal. By 1955, the Japanese tinplate toy industry was exporting hundreds of thousands of toys worldwide.
By 1953, they could produce toys such as this one, that has become an all-time classic:
No tin can this one, and not that rudimentary either me think...