What is the custom for celebrating baby 4th month?

4 mths custom i did for my son was to buy some stuffs loke chicken drumstick unchopped, ku cai, marie biscuit. marie biscuits must be string with a red thread around the baby's neck like wearing necklace lole dat. this is believed to reduce drooling. Ku Cai is to prevent him from having fever during teething stages. Chicken Drumstick is to allow him to taste food and ensuring he has more than enough food in his life.