The annual Science and Engineering Challenge marked its 10th year and more girls have "stepped up" as the need for females in these industries increases.
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Over 200 students from eight high schools geared up for the program that is designed to change students' perception about science and engineering.
Wagga High School student Lily Stein, 15, said her class was given the opportunity to attend.
"I thought it sounded like a really cool experience and I think science is a really interesting subject," Lily said.
"I have a lot of passion but I'm definitely thinking about taking this up as a subject for my senior years.
"There definitely is so many more girls going into STEM related industries, which is good."
James Vonmengerson, Mater Dei student, was building a car with suspension to go over a bumpy surface and said he hopes to pursue a career in a STEM related industry.
"This is what I'm best at and I want to do something along those lines," he said.
The all day program, held at Mater Dei Catholic College, sees 250 students attend each year with about 30 volunteers required.
Murrumbidgee Rotary Club's school organiser Jenny Lovekin said the challenge has become "very popular" over the years.
"We started off begging for the schools to come and now we've got schools that want to come, within Wagga and then also outside of the city," Ms Lovekin said.
"It's a good mix and girls are definitely stepping up to that area and really enjoying it.
"Since the program started 10 years ago, over 2000 students have gone through and we're working towards finding out what areas the students went into."
The Riverina Anglican College year 9 student Owen Ranby said he was performing the "very interesting task" of trying to build a bridge.
"I'm enjoying it and it's a good experience to gain science and engineering skills," Owen said.
Event coordinator Trevor Webb said Mount Austin High School was the only secondary school from Wagga that did not attend as they were unable to fill the numbers.
"We have eight schools, 32 children from each school here, including Albury High School, Coolamon Central, Mater Dei Catholic College, Wagga High School, Kooringal High School, Wagga Christian College, TRAC and Kildare Catholic College," Mr Webb said.
"It's part of the schools' STEM learning and we purchased the program from Newcastle University and then we organise the schools and volunteers.
"There's eight activities, such as making a bionic hand out of straws to manipulate it through string and we have a communication activity that is set up using the old Morse Code."