Sleepover Birthday Thank You CardsSleepover thank you cards feature cute sleepover images like a sleeping bag, slippers, nail polish and even popcorn. The background is polka dots and stripes for a fun way to send your thanks. Some features of our thank you cards: Professionally printed on 80# cardstock paper so you feel the quality. Teaches children how to send a meaningful handwritten note Easy to use because all you have to do is simply fill in and mail out 10 cards and 10 white