The high point of the fair experience for many students is their judging interviews. As a general rule, judges represent professional authority to students. For this reason, judges should use an encouraging tone when asking questions, offering suggestions or giving constructive criticism. Judges should not criticize, treat lightly, or display boredom toward projects they personally consider unimportant. Please be discreet when discussing winners or making critical comments where students, parents, teachers, friends, etc. might overhear.
Good scientists can identify important problems capable of solutions.
Watch out for memorized speeches that reflect little understanding of principles.