This was the moment her brothers screamed

Here is my absolute favorite photo from Christmas morning. My 3 year old, Kathryn, opens a gift from Santa to find something she would wear over & over the next 3 days -- A dress just like Elsa wears in Frozen. 

Frozen, by the way, is her brother's least favorite movie (in the world). 

So what makes this photo so special to me? I snapped it at the moment she pressed a button and the dress started sparkling with blue lights while playing "Do you want to build a snowman?"

That's when her brothers collapsed. It was so cute, until she wouldn't stop pressing the button. The dress has "mysteriously" run out of batteries!