This was taken last week at one of our Grandchildren's dance classes, during the session's Open house evening.
With the permission of the Instructors and the other childrens' parents I was permitted to bring a camera into the classroom to photograph our five year old grand-daughter. At one point she was dancing with one of her wonderful instructors and I grabbed this candid.
Nikon D3
zoom-Nikkor 24~70 2.8 AF-S ED G
2.8 @1/320th, ISO 2,500