i had a customer call me today asking if i could install some mulch/pea gravel around her child's tree house/play area. she is wanting to put a picnic table in there, and make it a nice little area for the kids. it will be roughly 1500 sg. ft. estimating it at 3 inches. i was wanting to see if any of you know how i could find about about the safer rubber type ground covers made for playgrounds. i havn't had any luck finding anyone locally to help. i want to give here 3 estimates on it one for mulch/pea gravel, and the rubber stuff. i feel the rubber will be more what she wants as long as we can get it here, and the price isn't over the top. thanks for your help.