National Geographic Da Vinci's Battalion STEM Kit Bombard Catapult Ballista

National Geographic Da Vinci's Inventions Battalion STEM Kit Condition: Used - excellent (2 new, one opened but complete). All original parts, wooden pieces, targets, and instructions included as pictured. All pieces are bagged and organized according to the three models. This STEM (Science, Technology, Engineering, Mathematics) set allows you to build and fire three different working wooden models based on Da Vinci's inventions: Bombard, Catapult, and Ballista. Kit includes all laser-cut wooden parts, 15 wooden projectiles, 3 pieces of sandpaper, 10 rubber bands, 1 plastic wire, 6 targets, and 3 learning guides with instructions. All items pictured—everything needed to construct each medieval launcher and learn about the physics and engineering behind them. Great educational activity for kids, students, and builders interested in science and history. Features National Geographic branding prominent on box and guides. Complete instructional booklets for each model included. WARNING: Choking hazard (small parts). Not for children under 3 years. Do not aim at eyes or face.