I didn't use any hair products till she was one and her curls got longer. I use shea moisture kids curling cream and shea moisture kids conditioner and shampoo. My LO has 3b hair so we only wash every 10 days and condition every other day. In the morning I spray her hair with water and then use the curling cream.
Not until she has more than enough hair. Extremely unlikely at 3 months to have enough and be the texture/curl pattern to need any product
I started using mixed chicks kids leave-in conditioner before bed & cantu kids conditioning detangler in the morning when getting her ready for the day around 9/9.5 months!