SOUTH Grafton High School Science Fair has rolled around for its fifth instalment, this year showing students the power of light and engineering.
The fair ,which began yesterday and concludes today at the Tyson St school, has attracted about 450 students from eight Clarence Valley Primary Schools.
The main event showcase of the fair involved robots built by students in the Engineering Department at Southern Cross University which used the power of light to sumo wrestle in front of the students.
Event co-organiser Amy Brennan, from South Grafton High School's Clarence Science Initiative, was impressed with the amount of students who were willing and ready to learn about science.
"It shows them that science is fun and science is cool," Ms Brennan said. "I am pretty lucky in that I teach Clarence Science Initiative who are a group of amazing young kids who do have a particular interest in science.
"So it is nice to be able to spread the science word to kids from years 5 and 6 from all over the Valley."
The two days of the fair are jam packed with fun and excitement for the students, with all of them taking home mementos of their experience.
"We have four sessions over the two days with about 120 students in each session," Ms Brennan said.
"During the sessions the students will take part in five different experiments and get to take home an object from each experiment.
"Then the students get involved with the robotic sumo wrestling in teams and at the end of the day Southern Cross University and [education group] Stellar have donated gifts for the students to take home."
The sumo robots work by way of light sensors attached to the robots.
The underside sensor will detect if the robot moves over the black ring, and will force the robot to turn back.
The front sensors react to movement and will drive the robot towards that movement.