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My son figured out how to adjust the rubber band tension after a few tries, and now his truck flies across the living room floor every time. Seeing him learn about momentum firsthand while having that much fun is exactly what I was hoping for.

The way the rubber band launches the truck actually shows momentum in action—my son re-rigged it three times to test different tensions. It's held together through a dozen crashes, which says a lot for a cardboard build.

My nephew was absolutely glued to the way the rubber band mechanism actually launches the truck forward—it made learning about momentum feel like pure fun. The pieces snapped together securely without needing any tools, and he’s rebuilt it three times already.