There are a lot of food that 4個月bb can eat (only for them to learn to eat solids).
Rice cereal is the best (different types and brands).
Fruit mash - apple, pear, banana, avocado.
Vege mash - carrot, pumkin, potato and kumara.
Always give bb a teaspoon to try first and increase bit by bit.
Always give bb milk first before solids.
Always try one thing at a time for a few days.