The students spent the rest of the lesson working individually or in teams designing and building a method for dispersing their seed.
St George's deputy head Sam Michau said every student was engaged in lessons like this.
"The problem-solving, collaboration and practical skills involved mean each individual can contribute something to the outcome," she said.
"I am always impressed by the creativity and resourcefulness of the students."
Evidence-based research supports the approach STEM and STEAM take to learning.
The learning in these lessons can be complex and it gets the learner questioning and reflecting at a higher level.
Just as important, the lessons are fun, engaging and support deep thinking, discovery and lots of great discussion.
"With our seed dispersal task, natural designs inspired some really innovative ways to use the limited range of materials available," Michau said.
"The students just think they are having fun and flinging ping-pong balls across the room, whereas, in fact, they are applying their learning in a real-life context."