Here are some more of my thoughts on doubling $1 into $2.
5) Start a BLOG using a free service and put advertising on the BLOG or promote an affiliate product. This would not involve the $1, and would take some work.
6) Offer to sell something on Ebay with your account and charge them $1 over the fees and costs involved. This is along the work side, but still not a bad way to turn a buck.
7) Collect cans, bottles, scrap metal, etc and sell it to a buyer. From what I saw elsewhere it takes a good bit of scrap to make any money. You might want to research more before trying this one.
8) Create a one page PDF with information that you are an expert at and sell it for $2 or a little more. There are free tools that will let you convert to PDF. I mentioned only one page because more will be mentioned about this in the future.
9) Loan the $1 to someone in exchange for interest. Obviously it will take a wile to double $1 to $2 doing this method, so I will move on.
10) Go to a casino and bet on red or black. Better odds then the lottery and this idea wouldn't teach anything. Again, I would not even try this one.
More ideas to come, feel free to submit yours or let me know about your Penny Project.
Michael