I take the blame.
Clearly, I haven't trained my kids well in the area of picking up after themselves but I'm telling you - it's going to stop. I'm drawing a line in the sand and these kids are either going to pick up after themselves or.... or..... well, lets just say mama can't take it any longer.
I came upon a blog of another mom who was also exasperated with the junk laying everywhere so she decided to create a 'ransom box". The basic idea is this: if after one request of "Please put your stuff away", the 'stuff' is left out, the mom gathers the items and places them in a 'ransom box'. For a child to get his things back, he needs to draw from a bag the 'ransom' to pay in order to get the item back. Her ideas were a variety of creative tasks ranging from scrubbing the bathtub to telling your sibling three reasons you love her.
I can't tell you how this plan will work long term, but I can say that after my son had to do 25 jumping jacks while shouting, "My mom is da bomb!" I don't think he will leave his favorite sweatshirt on the living room floor again. :)
If you'd like to check out her blog and see her list, check it out here.