If they like whipped cream frosting, you can get Pastry Pride. Depending where you are in the country (I'm in San Diego) it may be called be a couple of different names like Frostin' Pride or Rich's. It is frozen in one quart milk cartons and you whip it with your blender until it makes a shelf stable whipped cream frosting that is delicious!! If you have a Smart and Final in your neck of the woods, you can find it in their freezer section. I seriously cannot imagine anyone not liking this stuff; it is fabulous. Here's a link to a site with more info on Pastry Pride (go all the way to the bottom of the page) http://www.michelesartroom.com/Cake%20%20Supplies.htm
You'd probably be better off doing any decorations in crusting BC and placing on the Pastry Pride iced cake.
You can also go to recipes here or on Wilton . com Discussion Forum or recipes and get a non-crusting BC recipe--there are lots of them.