The children aged ten and 11 are going head-to-head with pupils from Giffnock Primary School in Glasgow, in a Re-inventing the Wheel art contest, run by Bridgestone and McConechy's tyre dealerships.
The competition encourages them to think about the environment and all of the schools involved will receive large, used truck tyres to use as raised beds to grow plants and vegetables.
The winning pupil from Scotland will receive an annual pass to a local educational centre or tourist attraction.
Donald Carmichael, managing director of McConechy's, said: "This is such a great competition, which children love to get involved in and we're thrilled to be supporting Broomhouse in their efforts.
"It's a great way for children to become aware of recycling and the environment and by giving them tyres to use as beds, we are encouraging them to think about the environment and sustainable living from a grass roots level."