The little boy was strikingly beautiful. I asked to borrow it. The child was dressed as a cowboy with an oversized hat, with his arm around a wagon wheel. I just wanted the face and so drew him in a snow outfit pulling his beanie off. I showed it to my art teacher who pointed out some anatomical areas to work on and then completed it.
Generic children are relatively easy when compared to the job of satisfying parents.
Children under two have defied the best artists. Ask for a delay in proceedings. One day they look like mom, then you see that the father's forehead or nose is beginning to appear. I find it really helps to also know the parents. One time I was painting a portrait of a young girl, I didn't know, from a photo.