The fluid movement of this kinetic energy sculpture creates a calming, hypnotic effect on any desk or table. Simply swing one of the brushed matte aluminum sticks, and the entire sculpture of sticks and angles will flow in unpredictable, chaotic motion for over a year. Designed in Germany, The Swinging Sticks™ are handcrafted of wood and aluminum and preset in motion for at least one week of testing to ensure their motion is as close as can be to perpetual. 4AA batteries required (not included). Stands 17.5” tall.