Lol been there, done that, got several tshirts.

I have been helping out with the project that team typhoon went onto after combat robotics.

Schools build a bot that is suitable for assualt course, sumo, football etc competitions from a kit which they assemble themselves. Very easy to make one. Would get chewed up combat wise but they are nice machines.

Not sure where your school is but the kits have been extended past the border so you may want to see if your school would be interested.

http://www.rampagingchariots.org.uk/http://www.rampagingchariots.org.uk/