The pattern is formed on an iron plate as a result of vibrations generated by external vibration generator. In principle, the sand or salt used for visualization of patterns is forced off to areas of plate where amplitude of vibrations is equal to zero (areas with no deflection). Plate has numerous resonant frequencies and for each one there will a unique pattern emerge from sand. Higher frequencies generate more complex patterns. This set is simple tool for demonstration of different vibration modes, nodal lines and resonance.