6 months. Age 6 months is the usual time to start solid foods. If a parent really wants to try sooner, he can try giving baby cereal at 4 or 5 months, but some babies' tongue movements and swallowing coordination are not ready for solid foods until age 6 months.
4 months. Typically infants can start solids at 4 months old. This includes stage 1 and 2 baby foods, dry powdered cereals or homemade purees. The order you introduce new foods is not important as long as you wait 2-3 days between new foods. No honey under 1 year old.