Whirligig

thingiverse

The Whirligig, alternatively called a BuzzSaw toy, produces a buzzing sound when spun. To operate it, print one whirligig and two buzzsaw sticks, then thread the strings through the center holes before securing their ends to the sticks. Wind up both strings and pull the sticks apart for optimal performance; refer to this PDF for further details: http://sparklab.si.edu/downloads/sparklab-whirligig.pdf