It's gel. I've got bags and tips, I just can't get the whipped icing stabilized enough to pipe with (those pics were taken after I scraped the awful border off).
My plan was to do something like this in pink:
(not my pic, it was posted in a thread years ago on here. sorry. :/) with one of those skewer type banners saying "Feliz cumpleanos". That way they could have their "writing" without my awful handwriting. Then they said they wanted it a day early and my whipped cream wouldn't stabilize.
I've decided not to send it. I'm going to try to fix it and make the extra trip to take it myself.