Amazon.com: Trebuchet: Robotic Self-charging Model for LEGO WeDo 2.0 (45300) (Build Wedo Robots — a series of instructions for assembling robots with wedo 45300 Book 9) eBook : Gergert, Vyacheslav: Kindle Store
This 9,000-Piece LEGO Technic Trebuchet Can Launch Projectiles 260 Feet Away - BrickNerd - All things LEGO and the LEGO fan community
Amazon.com: Trebuchet: Bulding instruction for the Lego Spike Prime 45678 set + program code eBook : Brodowski, Lukasz: Kindle Store