Instead of paper for the folding I used ribbon. It looks great but it is more difficult to attach because it tends to warp and doesn't "stick" as good as paper. However, I like the effect and thought it was worth the extra effort. I surrounded the edge of the shamrock with a long green sticker. This part of the card was then attached to the base card.
On the inside I added an Irish Blessing. The border of the light green backing was edged with an EKSuccess edger punch (English Ivy).