These girls make my heart happy... I am grateful that Sienna has found such a lovely friend, but I'm also grateful that both of them get to enjoy the creative, free play and imaginative games that they come up with together. They've been best friends for 3 years now. It's very cool :)
I kind of had paragraphs in my head about how valuable this friendship is to Sienna developmentally, but I might just leave that alone for now. Regardless of the reasons why, everyone is different in some way or other, and some more than most, but the true acceptance of your friends simply as who they are is the most beautiful thing about love and companionship. Sienna has that, as does her friend, and it is a pretty fantastic thing.