Happily I didn't have any trouble finding a svg cutting file for "Boo" on Etsy. Many to choose from, but I used the svg file from Sportrops and was very pleased that it cut cleanly and accurately.
Decided to keep it simple and decided to do an easel type card.
Finding all fabrics and notions needed to make the costume took a little time, but once I got started it wasn't too bad. Being that our granddaughter lives in a different state, the hardest part was not being able to have her try it on to make sure it would fit. I think it may have been a little snug, but hopefully her momma will be able to make the needed adjustments so she can "Boo!" tonight.