Can you buy Bitcoins at Walmart?

Excuse me, I was wondering if you could clarify something for me. I've been hearing a lot about Bitcoin and I'm really interested in investing in it. However, I'm not sure where I can actually buy some. I've heard of online exchanges, but I was wondering if there's a more traditional way to purchase them, like at a store. Specifically, I was wondering if Walmart sells Bitcoins or if they have any machines or services that allow customers to buy them in-store? I'd really appreciate any information you could provide.