What factor suncream should I buy for DD who is 11?

[twinkletoesbellyrolls]

Ok, know I am crap mother but gorgeous hot weather has passed me by as I am stuck in office from 7am - 7pm every day this week.

Darling DS isnt - she is 11 and smart enough to know she needs sunblock on. I foolishly binned all last years in a spring cleaning splurg and can't remember what factor I should be using on her.

Was thinking 25...is that too low?

I hang my head in shame....

I'm fair and wear 30

Thanks Furball! I gave up waiting for advice sadly and asked child free colleagues in work their opinion and ran to Boots in my lunchbreak and bought factor 30.

Obviousily now I have it the sun has gone in!