What you needBalloons
Blow up the Balloons, but do not tie them up. You can use a balloon pump also.
Use a clip or peg for a temporary hold.
Write the invitation on the outside of the balloon with permanent pen/marker. Allow the ink to dry.
Let the air out of the balloon to deflate it.
Pop the balloon into an envelope and post with a small instruction card that says “Blow Up The Balloon”.