Welcome to the Middle Ages
Websites to use for research:
http://www.learner.org/interactives/middleages/feudal.html
http://medievaleurope.mrdonn.org/commoners.html
http://library.thinkquest.org/10949/fief/medpeasant.html
http://www.smithlifescience.com/24-4Manor.htm
http://medievaleurope.mrdonn.org/rise_of_towns.html
http://medievaleurope.mrdonn.org/nobility.html
http://www.siue.edu/COSTUMES/COSTUME3_INDEX.HTML
http://www.medieval-life.net/games.htm
Catapults:
http://en.wikipedia.org/wiki/Catapult
http://www.middle-ages.org.uk/catapults.htm
http://medieval.stormthecastle.com/armorypages/catapults.htm
http://claymoreslinger.com/medieval_catapult.asp
http://www.redstoneprojects.com/trebuchetstore/build_a_catapult.html