The Trebuchets STEM Boost Kit is a hands-on force-and-motion kit for one high school student. Learners build and test a working trebuchet while exploring projectile motion, energy transfer, and engineering design through bilingual student guides (English and Spanish). Students experiment with counterweights, arm lengths, and release angles to see how each variable affects launch distance and trajectory. All supplies are included—no additional materials or technology required. Works in classrooms, makerspaces, afterschool programs, and home learning environments.