The design is for a birthday invitation, but it's a great idea for a launch party invitation! Encourage your guests to bring their balloons. They can double as a party game if you put little messages inside of them!
Making a balloon canopy worked out way bett er for me than the balloon avalanche I previously pinned. Just tape two garbage bags to the ceiling and tuck the ends into the door. The birthday boy/girl is showered with balloons when they open it.