I think it would be worth your while too. My daughters attended their friend's birthday pamper party a couple of months ago and it was fantastic - so my daughter has requested the same for her 8th birthday in January and I booked it yesterday.
The therapist will paint the girls' nails, do glitter tattoos, glittery hair-dos and do lots of jewellery-making in between time. The children decorate their own silver mesh cosmetics bags which form their Party Bags full of mini things like a bath bomb, emery board, bottle of sparkly nail polish and, of course a business card (hence the ease with which I was able to book her!). £15 a head and having seen how the previous party went, I'm absolutely happy to pay that knowing they'll all have a great time.
My friends and I have also organised our own pamper night on 4th December. we decided we wanted a range of mini-treatments available rather than full 30min/60min treatments so I've organised two therapists (one holistic, one traditional) for the 6 of us and we've each selected 3 treatments. Each treatment is £10 for 15/20 minutes so that nobody should be hanging around un-treated for any great length of time. My friend who's hosting the evening gets one mini treatment free from each of the therapist, and they're organising a couple of little raffles for us to win a little goody bag and £5 voucher for future use.
With me only offering spray tanning, I've teamed up with a local mobile beauty therapist and we're now offering a Triple Treatment Package for the forthcoming party season - Express Manicure, Express Pedicure and Spray tan for £40/single person or £35/double or party booking. We've got a couple of bookings now (one with 10 peeps) and depending on how it goes over Christmas we may well offer it more regularly.
I think you've got very little to lose by offering this service!!
Good luck xx