I had a prejudice against bikinis for girls. Then my dd(9) asked for one, and I realised I couldn’t explain why I didn’t like it, other than for sun protection and possible falling off / sliding up reasons.
So we bought UV leggings and top, plus sporty (ie not going to come off when diving etc) style bikini which she wore early morning / late afternoon in the pool on holiday, with the UV top and leggings when the UV was over 5. Turns out, she got a lot less itchy wearing the bikini as her skin dried faster.
I still don’t do Heelys, though. Seems like asking for a trip to A&E.