 Toy models have been employed to illustrate how retrocausality could be possibly realized. Price (2008) suggests a simple toy model featuring linked nodes that can assume different values, which he dubs the “Helsinki model”. If one interprets the nodes as partially ordered in time and the values of the exogenous boundary nodes as controllable, the dynamics specified by Price entails causal bi-directionality, i.e., both ordinary forward causality and retrocausality, understood in an interventionist sense. Although the model does indeed display particular behavior that can be naturally interpreted as retrocausal, a full-blown analogy with standard quantum mechanics is limited.