A cellular automaton is a simple machine that has a grid of squares. Each square has an "on" or "off" state, and it follows a specific set of rules to change states based on the states of the other squares around it. A stochastic cellular automaton is a type of cellular automaton that has an extra piece - it adds randomness (or chance) to the way the squares change states. So instead of following the same rules for changing states, each square has a small chance of doing something different. That means that it is harder to predict what will happen since there is randomness added!