LINCOLN, Neb. (AP) — University of Nebraska-Lincoln students have transformed several downtown parking spaces into temporary urban parks.

On Monday, a team of students set up a dozen exhibits as part of (Park)ing Day, a global challenge to transform parking stalls into interactive public parks for a day. The students spent the past few weeks finding materials and creating seating with pallets, cloth and other materials.

Students also used cardboard to make a two-hole mini golf course and 5,000 plastic bottles to assemble a small maze.

Assistant professor Peter Olshavsky introduced the project four years ago at the University of Nebraska-Lincoln to teach architecture students about the design process from concept to final construction.