Four Dalhousie architecture students stunned passersby as they showed off their summer project - and made a social statement.
They say there's not enough green space in Halifax and that their contraption is a way to "take the park with you."
"We're looking at the idea of green space in the city," said grad student Kevin James. "Even in the Public Gardens, you're not allowed to walk on the grass."
"I think our biggest issue right now is that not only is our green space being utilized for some of the wrong reasons, but they're under- utilized by the communities, and we do need more," she said.
The hamster-wheel-like project took four days to construct and is made of plywood and mesh. James said they attached the sod to the mesh with fishing line.
From Spring Garden Road to Argyle Street to the waterfront, the four students took turns walking in the wheel. Occasionally, they paused to let kids try it out, or to let a multitude of tourists and locals take photographs.