You can find some wonderful templates for making envelopes in craft stores. I used some really nice templates from Paper Source. Pick papers in colors and patterns that go wcell together. I used a mix of thinner patterned paper and card stock to give the cards and envelopes some stability. For the envelopes I cut out one side from patterned paper and one from card stock. Putting patterned paper inside of the envelopes creates a nice surprise effect for the receiver! Use a regular glue stick to put them together. The machine-sewn edges of the note cards are a small detail that adds so much to the overall look of the cards. Start by gluing patterned paper onto card stock using a glue stick and then sew around the card with a colorful thread. Write some letters!