My nearly 3 year old has been slow to talk but is really coming along now. A few things we have been doing is not pushing him, so if we know what he wants then just give/do without making him say it. People I know were telling me I was making it too easy for him not to talk, but then when I got a professional opinion, she felt that not making him even more frustrated when he really couldn't say that particular word yet was better if that makes sense. If it was something we knew he can say then of course we would tell him to say it. I know how hard it is when you seriously don't know what they want though

Another key thing for us has been taking the question out of it, so instead of saying 'can you say...' we simply said 'say...' The amount of words he came out with when we changed this was astonishing!

We always encourage his efforts. Even if what he has come out with is nothing like the actual word then we still say 'great talking, good try' etc etc.

But yes as others have mentioned 16 months is quite young, sounds like she is doing well so far!