Build fully functional replica of a real life model which works...
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Build Wind powered water lift
Build your own Phonograph, Car window, Crank Fan, Blender Mixer, Egg-beater,...
Build your own car with a functional steering wheel
Build your own model hand drill
Build Three Wheel Spring Racer, Wind Racer, Short Rubber band Racer,...
Build your own solar energy powered car
Build your own fully functional windmill powered shuttle ride