I have a client that has a 20 x 35 sand play area with a giant swing set sitting in the middle ....It has become weed infested and the sand is nasty to say the least....Do I pull the weeds and add sand ??? pull the weeds and level the sand and cover with playground mulch ??? I am looking for any and all ideas....as bad a job as it appears to be...It looks like a gold mine in labor.