The U.S. Department of Agriculture Forest Service Products Laboratory (FPL) offers easy-to-follow guidelines for modifying standard wood chips to make playground areas accessible to people who use wheelchairs or other mobility aids. Interest in the surfacing material has become widespread because of the need to comply with the Americans with Disabilities Act, and the low cost ($2 to $3 per square foot) for stabilized engineered wood fiber, compared to most existing systems ($10 to $20 per square foot). The technique for stabilizing wood chips, called engineered wood fiber, with a polyurethane or latex binder was developed by FPL researchers to provide an affordable method for making recreational and playground facilities accessible to people using wheelchairs or other mobility aids. For more information or to download the guidelines, visit