My wife and I just bought my daughter her first swing set.Here is where I need the help. Now to mark off the area and lay out base for play area. I spoke to a friend and he said he used 4X6 and rebar to frame out the play area with child safe mulch. My question is since I have never have done this job what is the best way to go about this... Frame out the size I need using maybe 2X4 or 4 X4 I am putting it in an uneven area so I will have to do some leveling should I remove the grass or leave it and put some weed block mesh down then put the mulch down. Baiscally use dirt or the mulch to level the play area and how should I frame it out.