Systems and methods for rewarding a child for behaving well while dining. One embodiment includes the steps of: generating indications proportional to the weight of food on a plate, calculating the rate of removing the food from the plate (Rr), and comparing Rr with a predetermined max eating rate (Rm). When Rr<；Rm commanding a container, which stores a reward for the child, to switch from a closed state to an open state when the weight of the food on the plate reaches below a predetermined threshold. And when Rr>；Rm not commanding the container to switch from the closed state to the open state when the weight of the food on the plate reaches below the predetermined threshold.
