Star Office, excellent program but even though I used it for a while earlier this year, I don't remember seeing this option in there. I believe quite a few people are still using "Star" or "Open Office" and they will be able to advise further on this.
I think there may be the option to do this from Stars version of "Powerpoint" this will enable you to design moving text, then insert in an email.
If it's links to the Christmas greetings cards [The one's you will see in the forum at the moment] that you want to send, just copy/paste the full URL address into your email window and ask the recipient of your mail to click on the link. The card/message will then open for them. j.