I have gift vouchers to purchase via my website, there is a link on every page for you to find! Just look for the Paypal thingy!
Vouchers are available for 1 and 2 hour appointments. What happens is that you fill in the short order form, choose your method of payment (doesn't need to be Paypal, that's just the system I use to manage my payments), and I post out the voucher to the address supplied.
Please give yourself plenty time to organise your voucher, I normally get them in the post same day if ordered before 2pm, after that its in the next days post.
The recipient of the voucher can then use my super easy online booking system to secure the appointment best for them.
Gift vouchers are valid for a year
What's not to like?