WPP#32 Arianna's 1st picture

Arianna's first picture ever!  So, she has known cameras since ever.  We took a lot of pictures that the phrase "Say cheese" comes naturally.  But this week she started to play with my camera and has realized that she can take pictures too! That was a big realization for her and for me since now besides posing and wanting to see the picture, she says to me " It is your turn (to pose)" so it is time for my little darling to get a camera of her own! 
Can you tell what was the first picture about?