The back story is my 4 year old son as I'm picking out my 6 mo clothes comes and sits beside me and says, "I'll buy you one, I'll count all my money and use all my money so you can can do it too" I was really confused so I say to him, "buy me what, buddy?" he then tells me he wants to buy me a Halloween costume so I can dress up too. I told him it was okay, I didn't need to dress up. He then said, "No, I really want you to, I'll buy you one, I'll use all my money!" (he was happy about this). I finally got him to agree to help me make one, he felt a little better.
So, I need costume ideas that are free and easy to make? Help? Ideas?