"These days, at least in liberal enclaves, a girl who likes baseball or wants her hair cut short is more likely to be called 'gender-nonconformist' or 'gender-expansive'..."

"... with any suggestion that she’ll grow out of such behaviors suspect as evidence of condemning rather than honoring them. She may be applauded for transcending another paradigm (the dread princess, with her ball gowns, glitter and wands) or monitored closely for signs to her adult orientation."

From a NYT article "Where Have All the Tomboys Gone?" Is there something wrong with the word (or the idea of) "tomboy" (or something good that should be revived)? I think it's better to use a word that expresses what we are seeing in the way a young girl looks and acts as she is now, than to be making predictions about what she'll do later on in life, especially if we're jumping into visualizations of her future sexual preferences and activities. It's creepy to impose adult templates. Leave the child to her freedom and personal privacy. Let children be children.

That doesn't mean you have to say the word "tomboy," which could be objected to because it's calling the girl a "tom" and a "boy," saying she's somehow male. It was a lighthearted word in the old days, and maybe for some it still is, but wearing comfortable playclothes and engaging in sports doesn't need to be associated with maleness. I'd step back and not go all gender-y with children. Let them be individuals and try to support whatever healthy, positive interests and attributes they find for themselves.

ADDED: Proofreading this post, I think I sound absurdly, flat-footedly sensible. The answers here seem so obvious to me. I don't know why so much discussion is needed.