This engineering motion challenge can be done with a variety of items found in your home or classroom, and can be easily adapted to suit many ages and skill levels. The basic goal is to build an obstacle course that involves a chain reaction (or domino effect) using items like balls, books, kitchenware, office supplies... anything that can move or help something else move in a given direction. This activity co-aligns with several Next Generation Science Standards, and includes a supplemental video!