  A quantum unitary evolution alternated with measurements is simulated by a
bubble filled with fictitious particles called amplitude quanta that move
chaotically and can be transformed by the simple rules that look like chemical
reactions. A basic state of simulated system is treated as a collision of the
two corresponding amplitude quanta, that gives the quantum statistics of
measurements. The movement of the external membrane of the bubble corresponds
to the classical dynamics of the simulated system. Measurements are treated as
the membrane perforations and they are completely determined by initial
conditions. An identity of particles and an entanglement is simulated by the
membranes touching. The required memory grows linearly where the number of
particles increases, but entangled states of the big number of particles can be
simulated. The method can be used for a visualization of quantum dynamics.
