Your child just 'discover' the wonder of hand and is now exploring them. Soon she will discover her toes. Just make sure her hands don't touch any dirty surface before putting in her mouth. Or give her a teether, but you have to trial and error until you found a teether she likes. My son went through 5 teethers before liking his current one. But still slip his hands into his mouth frequently. I just make sure to frequently clean his hands.