Left

because the nondominant is supposed to be stronger to hold things to free up the dominant to grab and be more active

which does she reach out with to grab stuff?

@kattastrophe, I was just watching Emmy and she could control toys better with her left hand compared to right

I think you can tell pretty early, I could tell my daughter is right handed when she could start getting control of her hands (around 3.5 months for us)