Think about the size of your creation. make sure it is not too big or too small. Ideally it will fit in a 3'x4' space.
Make it at home but be able to transport it to school. you'll want to most of your building at home. When at school, you'll have time to assemble your creation but not enough to create it.
If it is too BIG to bring in, film it! We can show your film on a computer during the faire!