I didn't do anything fancy with these envelopes.
For the SWAK envelope I just simply stamped one of the lip stamps with red Chalking Ink where the envelope is sealed.
To make the balloon border using the "It's Your Day" collection, I stamped the border image along the bottom of the front of the envelope in black Archival Ink. The balloons are colored with Faber-Castell Pitt Pens.
Aren't these dressed up envelopes fun? Try making one for the next card that you make!