It's a CAS (Clean and Simple) card. I use Hammermill 100 lb weight cardstock for my white card bases. The stamp is from Stampin' Up (Sunny Fun) and colored with Stampin' Up markers. I then scored some white lines at both the top and bottom of the card using a score board. Lastly, I grabbed a scrap of Stampin' Up Pool Party cardstock and punch a border using a Martha Stewart punch. I then cut that border in half and applied it to the card.
Simply flippy fun!