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The wide back wheel ensures that the model is steady and won’t tip over and turning handlebars send your bike in whatever direction you choose making your ride even more exciting
1 Work and Efficiency
Although only the one who can solve the secrets of the puzzle-box will get to enjoy the treasure of beautiful mechanics in its action
For the situation where the class is between 20-25 students and the group size is 5 people per group
Da Vinci Helicopter Wooden Kit Size:Ages 9+ The wide back wheel ensuresLeonardo da Vinci developed concepts for a giant air screw late in the 15th century. While today's scientists believe the design wouldn't fly, this model is a realistic scaled representation his design. It includes da Vinci gears, a helical sail and a crank. It also integrates well with figurines and can be painted or oiled.
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