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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
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+ and fractions to decimal equivalentsLeonardo 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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