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This wooden toy has been around for 20 to 30 years. Some versions have been made in plastic, although the wooden version is more traditional.We have found two designs, both made in wood, and have decided to offer them as a pair.Each one consists of a wooden block with a cylindrical hole drilled into it, and a wooden cylinder that fits loosely into the hole. You present it as a challenge to someone - get the central cylinder out of the hole without touching the toy at all.It seems impossible... until you see it done. You blow sharply over the top of the cylinder, which pops smartly up into the air. We used to think it was all to do with moving airstreams and the Bernoulli effect, although now we think it is probably an example of an air piston.Watch the video...Write a review about: RakettiAsk a question about: RakettiPeople who bought this item also bought:
