Thumb-Sucker?

Elsie has always shown a little interest in her thumb and fingers by putting them in her mouth, chewing on them, and the occasional suck on a few of her fingers. But today she took it another step by getting just her thumb in her mouth and really sucking on it. I must say it was pretty cute! We have tried many different pacifiers with her and pretty much tried them everyday for the first 2.5 months but she showed no interest whatsoever. I don't know if she will be a thumb sucker or not, but here is a cute little picture of her in her Sunday dress trying to get that little thumb in her mouth.