Think about her genetics and her likely teen/adult physique before you sign her up for dance (or maybe gymnastics). (And I say this as a former competitive dancer who seriously considered turning pro.) There's no need to invite eating disorders into your home if she would be equally happy doing karate or fencing or archery. But if you expect her genetically to be wispy and thin, there's no reason not to sign her up for dance and see how she does.
She will definitely NOT be wispy and thin. She will be average to above average height, average build. I don't really see her being interested in something like ballet now. She likes big giant movements, big jumps, big walls to climb.
