Above the surface of a silicon oil bath, falling droplets of the same liquid are suspended by a thin, acoustically-pumped membrane of air. Without coalescing for extended periods, these palpitating laser-lit spheroids bounce on the air-oil interface. Once released from a syringe the droplets assemble into a floating latticework, the nodes of which correspond to the sonic wavelength. Certain frequencies may entrain droplet pairs and larger ensembles into quantized orbits analogous to the bound states of electrons around atomic nuclei. When the wave packet emitted by a bouncing droplet interferes with its own reflections, the millimeter-sized droplet begins to drift or “walk” along its own wave.