Montreal-based puzzle manufacturer Wrebbit Inc., now a part of Hasbro, counts among its products an innovative line of three-dimensional puzzles, called PUZZ-3D. The PUZZ-3D collection features both world landmarks and fantasy locations, and ranges in difficulty and size. In 2011, The Strong received a donation of four of these collectible, highly detailed puzzles from a donor who assembled PUZZ-3D puzzles as a hobby during his retirement years. This puzzle, made of more than 1000 pieces, replicates the Sydney Opera House of Sydney, Australia. The puzzle captures well the opera house's distinctive architectural features, including the famous concrete "shells" that make up the building's roof.