Portable golf putting and chipping practice green

Multiple polymeric panels molded as a rigid integral body having a planar top surface and a bottom grid structure are attached together mechanically along irregular side edges. Each side surface has alternating upwardly and downwardly facing steps. The steps of adjacent panels engage each other to form complementary upwardly and downwardly facing pairs of steps. The multiple polymeric panels are overlaid with linoleum, carpet, synthetic grass, tile or wood flooring.