On the wall there are pictures of Kadi's brothers and sisters.
He recognizes their faces,
And he knows that they belong and that they are loved.
Maybe that is part of the reason why he loves to see pictures of him - Kadi - on the wall too.
To reinforce his knowlege that he belongs and is loved just as much as they are.
Maybe that is why he is so excited about his pictures around the house.
they are more symbols of the love his family has for him.
More symbols that this is his family, and this is his house.
Maybe that is why he loves to see his pictures.