I bought the plates at Target and the Dollar Store. And fiddled around with a few designs on my Cricut Expression and the adhered the vinyl to the plates. Voila! Instant Christmas present - I also covered them with saran wrap and put cookies and other goodies on them when I handed them over as gifts.
On "rockin' around the Christmas tree," I just had the completed triangle for the tree and used an exacto knife to cut out the diagonal lines once I put it on the plate - that was rather easy and kinda fun to do.
**After putting the vinyl on, you can't wash the plates in the sink or dishwasher, so it's good to cover them before putting food on them for a gift. Then they are just decoration.