Show them Red Faction (the video game) and then explain that all the destruction is calculated using binary space partitioning and that all they need for making similar games is to accurately calculate the intersection of planes, lines and points. Add a few linear forces and numerical integration and there you have your Trojan horse for getting kids hooked.
IDK your age group, but there's tons of nostalgic references and easter eggs. The game appears to be based on the Super Mario Odyssey engine, and the way Nintendo generally approaches the "all ages" problem is to make the plot easy, with tons of optional challenges and a set of hard levels in the "post-game" content. But I'm not very far in yet, so I can't promise anything on that front.
