Taken from (http://www.babycenter.com/404_when-will-i-know-whether-my-baby-is-a-righty-or-a-lefty_6716.bc)
"Your baby's preference for her right or left hand may start to appear as early as 6 to 9 months of age. Even so, you won't be able to determine true right- or left-handedness until your child is 2 or 3 years old, when she'll begin to favor the same hand consistently. And some children may be ambidextrous (using both hands equally) until they're 5 or 6, when they finally make a choice.
Hand dominance is greatly influenced by genetics. If both you and your partner are left-handed, your child has a 45 to 50 percent chance of being left-handed as well. (About 10 percent of people are left-handed.)"
My first would use her left hand quite a bit when she was younger but once she got closer to 3 she changed to her right. Know my 2nd child is a lefty. She is almost 3 and it is becoming more and more dominat. I am ambi
at 12:54 PM on Jan. 13, 2010