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how can i make a model?

i have to do a 5th grade sciece fair project,its called "up stairs,down stairs two light switches in the hall way."can u give me some idea's?(its due march 26,2010)
ally, March 2010
See here...

http://en.wikipedia.org/wiki/Multiway_switching

Small bulb holder & small bulb & bits of wire & a battery box & batteries & two switches each with three connection terminals.

Good luck...

Peccavi, March 2010