Cause that would be awesome! Lol
How and what kind of frosting?
Hmm I have never done it but you could try to pipe them on waxed or parchment paper and then freeze them. I have done them in white chocolate before and it works great. Here is a pic:
I just used the cheapo Wilton Candy Melts. You can pipe them as far in advance as you want to-just keep them covered. Yeah you can do a lot with white chocolate or candy melts, including making snowflakes!
The only thing I don't know about royal icing is whether or not the dry decorations will hold up for a while on a buttercream cake. You might want to do some experimenting.
It does... especially on BC display dummies!