Pop-up basics: The V-fold

Have you wondered how I made the bird pop-up card I made earlier? It turns out that I made it using a simple technique: The V-fold.
The V-fold is a pop-up technique that allows you to have almost any shape pop up when the card is opened fully. To make a card with the V-fold, follow the steps below..

 Make any shape you want(for this example I have made a rectangle), and fold it in half and make two flaps on the bottom. There should be some gap between the edge of the flap and the fold line.

Open the card and stick the shape on top of it using the flaps. Make sure that the centre fold line on the shape coincides with the fold line on the card. Also make sure both halves of the shape are stuck at slight angles. For further clarity, the back and top views are given below.

For example, look at the bird card which I mentioned earlier. You'll notice that the tail is actually a V-fold.

So that's how to do the V-fold! Have a popping time!