Of course not original and they shouldn't be discouraged from cartwheels either, but shouldn't we be teaching them to cover up, in a way that is not actually making them feel bad or having to change their play? Not just cartwheels, there's monkey bars, swings, climbing walls, skipping (to a point), or dresses flicking up.
And it does not get hot in the UK, "double panting" will not cause a severely sweaty uncomfortable vulva. Even in Australia it does not cause suffering!
I'm thinking of the dancers etc that wear the twirly skirts whee you are supposed to see underwear. Not being a dancer I don't know if its part of the skirt or not, but you never see a pair of white greying floral or possibly Dora pair of knickers under those skirts they (whatever its called ) have on.