Bubblefish by Simon Anderson

This design is flat until the very end, when you inflate it with a puff of air.

1 Colored side up, fold in half from side to side, crease and unfold, in both directions. Turn the paper over.

2 Crease and unfold both diagonals.

3 Fold the left edge to the right, using these creases.

4 Fold a single flap over to touch the horizontal crease.

5 Fold the lower corner to the left corner.

6 Fold the same flap back and down.

7 Swing the lower flap upward.

8 Fold the rear flap downward.

9 Fold the lower corner to the left corner, on both sides.

10 Fold a flap down, repeating underneath.

11 Fold inside the model, repeating underneath.

12 Hold at the top, and then blow into the model to inflate it into a triangular form.