Earlier this summer I built this playground set for my son. Actually, the bulk of the wood is from a recycled ultra-pallet that was going to be thrown away at work, and as you may remember I have an affinity for reclaiming lumber. The other parts actually came pretty easily as well (not to mention cheaply). The rope net I made from rope and a piece of ½” PVC pipe for a grand total of about $20. The rock wall was part of the pallet, and the rocks came off of ebay for about $25. The slide was given to me by a co-worker. The only thing that I put any amount of money into is the sand box, which ran about $80, and if I had been a little more prudent I probably could have built it using other reclaimed wood. The bulk of the playground set actually fell under my two tenets for work, 1) I am very lazy and 2) I am very cheap (and more so the latter).