First, let me say that I am a licensed cosmotologist who is africian american. Here are a few suggestions: 1.) Don't wash his hair every day. He needs to keep some of the natural oil. 2.) Try using lotion on his hair when styling. Johnsons and Johnsons has some oil in it and it will help to keep the hair supple. ( I do not recommend the PINK OIL because it builds up on the hair shaft and eventually breaks the hair and causes extremely dry ends.) Celebrate the union of two cultures and experiement with all kinds of hairstyles. Be careful going to just any salon, becuse some do not know how to take care of transracial hair and will do more harm than good.
As his texture continues to change, please feel free to contact me for more advise. Adventually you may need to use a heavier oil on his hair. Good luck and congratulations on a handsome transracial baby boy! I bet he is the apple of your eye.