  In the standard formulation of quantum mechanics, there exists an inherent
feedback of the measurement setting on the elementary object under scrutiny.
Thus one cannot assume that an 'element of reality' prexists to the measurement
and, it is even more intriguing that unperformed/counterfactual observables
enter the game. This is called quantum contextuality. Simple finite projective
geometries are a good way to picture the commutation relations of quantum
observables entering the context, at least for systems with two or three
parties. In the essay, it is further discovered a mathematical mechanism for
'drawing' the contexts. The so-called 'dessins d'enfants' of the celebrated
mathematician Alexandre Grothendieck feature group, graph, topological,
geometric and algebraic properties of the quantum contexts that would otherwise
have been 'hidden' in the apparent randomness of measurement outcomes.
