Machines
Pathfinders™ Medieval Siege Catapult Launch STEM in your classroom building a catapult that integrates history and physics! Students build a machine which has fascinated people for hundreds of years – the catapult. After construction, they become
Complete Kit
physicists as they transform stored energy into kinetic energy of a projectile. Adjustable pads on the crossbar alter the trajectory, allowing students to study the effects of their experiments. Twisting the rope helps visualize torsion, and releasing the projectile demonstrates mechanical advantage. Lessons apply to real life, from twisting off bottle caps to opening a car door. Kit includes precision-drilled wood parts, plasticine projectile, and instructions. Recommended for Elementary and up. ^ CHOKING HAZARD (1). Not for under 3 yrs.* TM35-125 .................................................. Ea $ 24.95
Pathfinders™ Medieval Siege Tower Blend engineering with history as students construct a period-accurate siege tower! From 900 BC to medieval times, siege towers were common military structures used to climb over an enemy’s ramparts
Complete Kit
during battle. In this kit, students build a fully-functional model with historically accurate details like removable ladders, a drawbridge, and a torsion-powered catapult! After assembly, students see how ancient cultures engineered solutions to solve problems. They can also mold projectiles out of clay and get hands-on experience with levers, torque, and trajectory as they fire upon friends. Kit includes all parts, soft modeling clay, and instructions. Recommended for Elementary and up. ^ CHOKING HAZARD (1). Not for under 3 yrs.* TM35-126 .................................................. Ea $ 39.95
Back view
Front view
Pathfinders™ Medieval Siege Trebuchet Ready, set, aim for project- based learning while creating a replica trebuchet! Students build a working 13th century trebuchet, considered to be the most powerful of siege engines at the time! As a replica
Pouch holds projectile
of Leonardo da Vinci’s historical design, students notice accurate features such as pegged joints, a leatherette pouch for projectiles, and a wooden box for the weights. Not only do students become engineers, they participate in a hands-on physics lesson, too as they experiment with different projectiles and heavier or lighter counterweights to see how they affect range and power! Kit includes all parts, soft modeling clay, and instructions. Recommended for Elementary and up. TM35-127 .................................................. Ea $ 34.95
^ *For full CHOKING HAZARD descriptions, see page 136.
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