@Courtney Dong - good thing I didn't see this before the candy land party...I would have turned the playhouse into a gingerbread house!!
Natural playspaces in your own backyard. Definitely plan to do this. Follow the links for more ideas.
"Kenan also cut a ton of natural wood blocks for the kids. They had a great time building fairy houses and structures and kingdoms and knocking them down again. Ours are really roughly cut (husband used a chain saw), we didn't sand them or seal them or anything. It is truly amazing to see their imaginations at work."