A few months ago, my sister in law had a birthday. I was still on a kick about what I could do with my Silhouette. For $10 (minus a 40% off coupon) I got a pack of 40 cards and envelopes at Joanns. The cards are adorable! I also had some adhesive backed card stock on hand. All I had to do was cut out "Happy Birthday" and stick them on the card. Super easy and so cute! I could spruce it up by cutting out a little flower next time. I love how easy it was to create an adorable card...and it was fairly cheap too.
Note. I used my Silhouette to cut the letters. I used the 'heavy cardstock (89lb)' setting. The 'medium cardstock (65lb)' setting didn't cut through all the way.