Just find the cheapest lemons you can. (This is about a bag and a half from Sam's - each bag was about $3. The fake ones would be cheaper in the long run.... but I'm all about cheap and cheerful for now. Plus, I won't have to store these somewhere when I'm over the whole lemon idea.) Dump the lemons into a glass container, vase, bowl, whatever... and you're done.
This makes me want to start making lemonade... mmm... I love fresh lemon slices in mine. Happy Spring!