Cheapest DIY Atlas Stone

I wanted an Atlas Stone, but I didn't want to pay for a mold. Why should I have to pay $80+ dollars to make balls of concrete? After several days of online searches, brainstorming, and designing, I had a plan. Using paper mache, a plastic ball, sand, concrete, and a plastic tub, I would be able to very cheaply (less than $15 - basically just the cost of the cement and ball) make my very own Atlas Stone. Based on my searches, this is the easiest way to make a DIY Atlas Stone. It's definitely the cheapest. Here's a picture of the final product: