This is an excellent activity for teaching self-control in students. It is quite useful in classes with several behaviour issues. It's important to teach children to monitor and reflect on their own behaviour. It is also important that students set personal goals to help them achieve healthy self-control of their action, words, desires and emotions.
This activity was used in conjunction with a quick video of "The Marshmallow Experiment" on YouTube.
Another useful video is footage of a dog obeying its owner, awaiting a treat.