Chinese spinning toy hums loudly on a thin string

Standard yo-yos are entirely too quiet and boring. The Diabolo involves balancing an hourglass-shaped spool on a string tied between two sticks, whipping it around until it achieves terrifying rotational speeds. When spun fast enough, traditional bamboo versions emit a loud, hollow whistling sound, ensuring everyone in a three-block radius knows exactly how good you are at playing with string.