The water mirror is a good place to visit and to take pictures, but it's hard in spring or summer to get only one person in the frame!
She was playing in the shallow water (an inch) and maybe learning how to swim
Yes probably she is pretending that she would know how to swim. Not quite as it should be but she'll get there :-) Love this fountain/water mirror in Bordeaux. It must have been one of the first ones with shallow water? At least it is the one that became famous with photographers.