Easy Origami Envelope

I've tried a few different origami envelopes, but this one, I've found, is the easiest.

It's also perfect to put your Birthday Scratch Card in!

All you need is a piece of square paper and glue!

Start with a square of paper.  I used one I made from an A4 piece of paper.  Then fold it in half, from corner to corner.

Fold the triangle you've made into another, smaller triangle.  Then unfold the paper.

Next, fold two of the corners into the middle of the paper to make two triangles, as shown in the picture above.

Take one of the corners that you haven't folded into the middle and fold it so that the corner tip is just a little further up than the edges of the folded in triangles, and in line with the middle of the paper.  Unfold to glue the flaps.

After gluing the envelope together, fold down the triangular end and tuck it into the envelope.

Finally, fold down the remaining corner.  To seal the envelope, why not use a cute sticker?