Re: start early or wait
I would wait until 6 months, but I am kind of crazy opinionated about starting solids before babies are completely ready. Is she sitting up by herself and grabbing things with her hands and putting them into her mouth? Those are another two signs of readiness. Go by age first, then look for the other signs.
In the meantime, give her a spoon and cup to play with while you eat and she will feel like she is participating, too.
My little man was born 12/17/2010.
Baby girl was born 4/30/2014.