Moving

I'm pondering a problem we seem to be having. Sena isn't crawling, and it really shouldn't be a surprise to me. She's figured out that if she says, "uh, uh, uh," mama or papa will come move me. So, instead of learning to crawl, fall, and reach- she rolls onto her back and looks at us nice and innocently, saying, "Um, next?!" The funny thing is that although this gives her some sort of gratification, once she learns she can move on her own, she'll have the instant kind of gratification, and she'll be moving even further toward her ever-illusive independence. So, should I settle for her "uh, uh" in order to delay this?