What is the most logical next event?

How to make an envelope advent calendar
Choose some paper for your envelopes.
You can get really creative here. You can use the same color and pattern for each envelope, or you can mix-and-match.
You can use solid-colored patter, patterned paper, or even double-sided paper. Scrapbooking paper is great for this, but so are kraft paper, old book pages, wrapping paper, and origami paper.