I was trying to get answer to question if it's possible to construct non-contextual ensemble from contextual particles. As a result I constructed this simple toy model in excel. It is using kind of "quantum memory" as polarizer. "Quantum memory" of polarizer evolves coherently with horizontal (vertical) photons but it can evolve symmetrically or antisymmetrically in respect to combined horizontal/vertical photons from different subsequent pairs depending on absorption/re-emission of incoming photon. Horizontal and vertical photons in addition have 0 or Pi phase i.e. symmetry or antisymmetry between different H(V) photons. Absorption/re-emission of photon is non-contextual if polarizer is oriented at right angles but contextual (it depends from "quantum memory") for other angles. However for 45deg. angles and marginally for other angles ensemble as a whole is non-contextual. I thought that this toy model might give some common ground for discussions of contextuality or non-contextuality of particles and ensembles. Any comments about model or contextuality in general? Is it right to say that particles in this example are contextual but ensemble has quite non-contextual properties?