Crossroads Elementary
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Catapults
Catapults are examples of engineering dating back to the Middle Ages (1400 AD).

 The Hobby Shop   Visit The Hobby Shop and practice principles of the Trebuchet. Load up and launch by clicking on the garden hose by the window. It will take you outside to launch balloons.
 NOVA Online - Trebuchet   Excellent information on trebuchets, thier history, how they work, and a chance to try a simulated "Siege the Castle".
 Trebuchet   What is a trebuchet? When were they invented?
 Stone Hurling Catapult   The catapult was an ancient machine that could hurl heavy objects with great force. This catapult is a model of an ancient Greek catapult used in the year 400 BC.
 Paper Trebuchet   Download plans for a paper trebuchet to build at home.
 Trebuchet Plans   Plans with pictures for building a 1/6 scale working trebuchet.