Double, double, Halloween trouble; kids get older and parties bubble! Sprinkled with bubbly confetti, this double trouble Halloween birthday invitation stirs up lots of double trouble for a sibling birthday party. Spiderwebs and stars accent your custom wording, which you can change for all your party needs. To make this into a scary keepsake, you can include 1-2 photos as well on this invitation. See more ideas on the product page for this design here: Halloween Double Birthday Invitation.