I was at bounce and rhyme at the library the other week and a lady there handed my son (nearly 1) something which he took with his left hand, so she asked if he was left-handed. I haven't really given it much thought. He uses both hands, though on balance I'd say he seems to favour his right hand (both DH and I are right-handed but my dad is a leftie). Not that it matters at all really, but now I'm wondering when other parents were able to tell their children's handedness for definite.