Christmas e card with some animation

I need to create a Christmas ecard that I can send to clients, I have a hand-drawn illustration for the cover and want some animation ie text to slide in above a particular image on the card (Santa and his sleigh) I'd like the card to open to show the message 'Happy Christmas' or something similar.

This is urgent and ideally, need this over the weekend if anyone can help.

Many thanks

Vicky