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Leonardo da Vinci says men may travel to the skies using screw-like devices. The discs' blades are oriented to look like helicopter blades. When the disc is pushed hard enough from the screw-like launching stick, the mechanical force propels it high into the air, allowing it to fly. Thread the collar onto the spiral stick with the wide brim facing up, using the flat handle at the base as a guide. Allow the propeller to wound down after threading it onto the stick through the tiny opening in the centre. Push the collar upwards quickly while holding the stick upright and clasping the collar with your fingers, and watch the propeller explode off the stick and fly! This product can be used in Australian Curriculum-aligned classroom activities. This product is also an excellent teaching tool in the classroom and at home.