I found inspiration for Soprano's birthday invites and thank yous on Pinterest. I designed the invitation info in MS Publisher and then printed them on white cardstock. After they were printed, I cut the label shape with a Nestabilities die. I made the thank you cards the same way, just leaving the white die shape blank for Soprano to write her own message.
cardstock: pink cardstock mat (unknown), Georgia Pacific (white)
patterned paper: Pixey Stix paper stack (The Paper Studio)
tools: label die cuts (Nestabilities), Old West cartridge (Cricut)