Erik's track definitely shows the high ceiling example of chain reactions. Watch the thought process behind his models interacting with each other.
Episodes from the School of Ridiculous Inventions are open-ended, inspirational resources you can share with your students learning how to brainstorm and act on prototyping ideas following an iterative and creative design process. There is a suggested list of resources to use if students want to try remaking the projects made.
To construct the large chain reaction, Erik made 11 different elements to his chain reaction, much of which is already laying around in his environment. He connected them together as a large unit to initiate a domino effect of interacting one mechanism at a time.
Here are resources shown in the episode to get you started on your process.