ASTON, Pa. (WPVI) --Hundreds of young scientists showed off their inventions Tuesday in Delaware County.
Students from middle and high schools in Bucks, Chester, Delaware, Montgomery, and Philadelphia counties took part in a Science Olympiad.
It was held at Neumann University in Aston.
This year's competition included bottle rockets, electric vehicles and robot arms, among others inventions.
The students competed for medals in two different age groups.