1. Treat the hair of the old man as nothing first.
2. Then focus on the nose of the old man.
3. The nose is actually the girl's face
4. The eyse of the old man are the hair for the boy and girl.
5. The beard is actually the dress for the gril on the right and the clothes for the boy on the left.
6. The mouth is the arm of the boy.

I had to look at the answer before I figured it all out.