That's a hard one!

I am a girly girl- makeup, I was experimenting with mums makeup from a VERY early age, but I don't remember her showing me how to apply it.
I was allowed to wear minimal make up at 13.

Periods were explained to me when I got mine at 11- IMO, that's too late.

I started wearing a bra at about 11- as I was an early starter.... But I think that if you notice your girls developing- even a small amount- grab some crop tops.

My parents never talked about the birds and the bees or contraception.
I think that depends on the child- but IMO around puberty would prob be a good time for the birds and the bees.
Contraception also depends on the child- but hopefully a nice open relationship with them will encourage them to talk to you about it.

I wasn't allowed to colour my hair till I was 16.
I remember for my deb- I got my hair colored and professionally styled, nails done and make up done- felt very special :-)