"We were also marked on how tidy we kept our work stations," said St Anne's team member Jenna-Jade Lacy.
Each work station contains an assortment of easy to use equipment, including gears, wheels, pulleys, weights, tools, aluminium framing, motors and electronics.
The teams work together to select the right equipment and fit them together to build a bridge, a "moon rover" vehicle with gearbox, an electronically wired safe, a set of scales, a bungy jump for a 1kg weight and a contraption that removes toast from a toaster and puts it on a plate.
The St Anne's team said it was was great to work co-operatively to find the best ways of completing the challenges and exciting to see themselves in the lead on the electronic score board.
"Every time you complete a challenge, you push a big red button and your song will play so the judge knows to come to your work station," said Riki.
The challenges in the finals series require more problem-solving , challenging teams to think harder.