My neighbor's 8 yr. old daughter wrote with permanent marker on my 2 yr. old daughter's brand new playhouse. We'd only had it out in our yard probably 2 weeks and when I went to move it to mow, there's her name on the door, and chicken scratch writing on the outside wall, etc. I was FUMING..... Long story short, one swipe with a damp Magic Eraser and it was GONE. No purple residue from the permanent marker or anything! The type of material was that hard porus plastic stuff, like you'd find on most large children's outdoor play structures. I can't begin to say how relieved I was, that playhouse cost $250! The magic eraser? On sale, 2 boxes (2 erasers in each box) for $3! Totally a life saver and a WONDERFUL investment when you've got a toddler around! ... View related article.