Origami is a paper crafting process by which you can make simple models come to life. For example, if you want to make a model of a virus, and already have the virus legs built out of paper or wires, the head is an easy piece to build using a piece of square paper. There is even an easy place to install the neck and tail fibers of the model. Once built, you can add labels and attach them to your model
Lay out the sheet of origami paper with a straight edge facing you, colored side up. Bring the upper-left corner of the page to the bottom-right corner, and make a crease. Unfold and repeat on the other side.
Tun the paper over and fold the top edge of the page down to the bottom. Unfold and flip it back over.
Bring the top edge of the paper down to the bottom, and tuck the sides of the paper in to the center. The folds on the left and right sides of the paper should touch at the bottom of the model, forming a triangle.
Bring the top layer of the corners up to the center point on the model. This should form a square on the top layer of the paper, with a corner pointing toward you. Flip the model over and repeat.
Fold the side corners on the top layer in to the center crease. Flip the model over and repeat on the other side.
Fold the top points, the top layer, down and over the sides. They should create a sort of arrow-shape over the side.
Fold the corner back in to the center of the model. Repeat on the other side.
Tuck the flap in to the pocket formed the flap below. Repeat on the other side.
Flip the model over and fold two more corners to insert into the pockets.
Pull gently on the two layers to separate them out and create the head of the virus. You can also blow some air into the model to inflate it slightly. Make the model as wide as you want it to look. If you inflate the model fully, it may look boxier than you want it to.
Insert the neck of the rest of your virus model to complete the effect. You may want to glue or tape the model together.
For more information on how a virus looks and functions, consult the document under References.