I witnessed the sweetest thing yesterday.  My sister has foster children.  A, who is 4, has unsupervised visitation with his father on Saturday and Sunday.  B, who is 2 1/2 randomly stays with his mother.  Yesterday, B's mother had my sister come get him.  My mother and I watched him while my brother-in-law went to pick up A.  When A got there, he came running into the house and just went past us.  He ran up to B and they stood there and hugged, squealed and giggled.  They dropped their arms and then hugged again.  The entire time they were squealing and giggling. Then they ran off to play. They were so excited to see each other.  They refer to each other as "Brudder".  They have been together since June, 2010, with the exception of a 6 months when A lived with his biological parents.  They love each other like real brothers. I hope they can remain friends forever.  They are both so sweet and so cute!