If you have a a Fp to meet them, the personal interaction will mean more to your Frozen fan.
With 7 shows, you can always walk by Premiere Theater to see what the line looks like. If you can enter the line and be under the covered portion of the queue, you'll get into the show, no problem.
Contempo Cafe at Contemporary sells the large Frozen cupcake... it is beautiful! A huge white mound of frosting covered with blue sugar crystals. I think that would be better than the mini-cupcakes. DD had a few mini-cupcakes during the SWWs and she reported they were sometimes frozen and sometimes stale. This had also been reported by guests at the Dining venues.
If you don't tell your little one what the package entails, she will never miss it!