You should wait until she can sit up unaided and is able to bring foods to her mouth on her own. For most babies, that's about 6 months though could also be later. We didn't wean until 6 months, but my daughter started finger foods then. They won't actually eat much of them as it takes a while just to practice moving food into the mouth. As long as it's past 6 months, you can try just about anything - sticks of raw veg, mashed potato, roasted veg, banana chunks, slices of apple or orange, strips of roasted chicken, fish fingers, etc. Anything in a stick shape until she develops her pincer grip (usually around 7-8 months) and can pick up smaller bits, then you can feed just about anything in any size or shape. My daughter picked up and fed herself a single grain of rice yesterday!
