This model doesn't really look anything like a real frog, yet somehow-by the magic of origami-is immediately identifiable as one. The most important feature is the small white triangle on each eye, which give the model a focal point.
Begin with a square of paper, frog colored on one side.
1. White side up, fold in half across the middle, bringing the bottom edge up to the top edge.
2. Unfold Step 1.
3. Using the center line as a guide, fold the four corners to the middle.
4. Fold dot to dot, bringing the horizontal edge of the triangle to lie along the folded edge. Make a neat corner on the right.