Genuine product imported from Japan - please excuse the variable English Translation - full original Japanese text is included below.
It is the work kit of the flight object of the helicopter type called "the aerial screw" which Leonardo da Vinci devised.
An English manual with an illustration and a Japanese manual abstract enter the set. As it is the manual which is kinder than other foreign goods, and is plain, I think that I make it and do it. However, with at first reading the contents of the manual if open it of parts please start production after confirming it.
[wooden scientific model]
A brand name: Helicopter work kit of Leonardo da Vinci
Completion size: Approximately 190*240*350mm
Material: The Thursday and Friday genus, string, others
Set contents: Wooden parts which have been processed, metal Heaton,
Plastic pipe, string,
Canopy made of wooden clothespin, cloth,
Manual with English illustration, Japanese abstract
Production time: It is four hours from 3.5 hours
Target age: 9 years old or older
After assembling this product in our store, there was a considerably hard part when I put a circle stick through the hole of all parts and might not enter when I hung sandpaper on the circle stick and did not thin it.
As precision is high and is not produced like a domestic product, I do not recommend the purchase to the which cannot do size adjustment by yourself.