A banner ad that, when hovered over, will “flip” to reveal its other side, which is a second banner ad. Impressive and fun. Note: Uses cutting edge browser features, so Internet Explorer < 10 won’t work well.
The Coupon Ad
Create a cutout-style coupon to promote a sale or event. When your users click on it, they will be taken to a mobile-friendly page where they can print the page or keep it handy on their mobile device.