Spa day for mummy and 9yo?

[4happyhours]

Does anyone know if I can book anything like this anywhere? My DD deserves a treat and I thought this might be a fun thing to do with her.
I'm south midlands, but can travel!

I haven't come across a spa that will do anything for a 9 year old. They have to be over 16 IME.
The only thing I can think of would be getting your nails done - but then she wouldn't be allowed to keep them for school, so you would have to take all the varnish off again.
What about doing something like painting pottery or similar? Mine used to enjoy that at that age.
They used to design a pattern on a paper plate and take it with them to copy onto the real thing.