I agree with CP, only do it if you have a relationship with your provider. Your gift will stand out if you put $ in a holiday themed red envelope, and then take it to her on a day that you are NOT coming in for a session. If she's Chinese, 8's are special, but 4's are outright awful, as the Mandarin word for four sounds eerily similar to their word for death. Believe it or not, $88 would be better received by many girls than a C-note!