The average cost for back-to-school supplies for families is now around $890. Families are invited to attend their local event, and each present child will receive one backpack while supplies last.

At the world's largest science fair ... She designed a bulletproof backpack that can be worn by elementary school children. "I can't vote, but I can engineer," Cotroneo told Insider.

He brought lightweight packs to millions of students and transformed the way they carried their textbooks to school.