This is a card I made for my sister last March. It is called a "File in the Middle" card and there's a video by Dawn that gives instructions.
The matte on the front was made with a border punch by Paper Studio. The decorations were 3D scrapbook attachments.
This view shows the inside when open. There is a section in the middle that has a "porthole". When folded one way it shows the lucky horseshoes and ther other way shows the shamrocks.
I punched out some more of the border and attached it to the inside. I also cut out and attached the light green shamrocks and then wrote the sentiment. Around the "portholes" I attached circular frames made with two circular punches (inside cut by smaller circle).