Plastic foam and foam rubber blocks and pieces in various forms, namely, light-weight, interlocking, stackable and modular load-bearing plastic foam and foam rubber with a hard surface applied to the working surface, and further with a exterior coating applied to resist deformation and weather conditions, and to provide frictional non-slip use which can be used as stand-alone units or as complimentary units within larger structures to build various indoor and/or outdoor portable elevated surf...