<p>Multiple molded polymeric panels of various configurations are mechanically fastened together along a side surface having alternating upright and downward facing steps containing fastening elements to provide putting greens of different dimensions and shape. Each panel has a planar top surface and a bottom integral grid supporting structure. A simulated grass overlies the joined panels. Raised pads are optionally placed between the top surface of the panels and the simulated grass to provide a contoured green.</p>
