Start with your dollar bill, with General Washington's forever stoic face facing you. Apologize to him for what you are about to do to his face, since his stare is probably making you feel guilty.
Fold your dollar in half hot-dog style, and make sure the ends meet at exactly the right spot, as it's important for the next steps. Crease the fold sharply with your fingernails.
There should be a clear crease when you open the dollar back up and observe how Washington now looks like he has an underbite.
On one side of the opened dollar, fold each corner in to the crease you previously made so that they meet in the middle.
Make sure that the corners meet together exactly, not overlapping or leaving too large of a gap. If you can't exactly get it right, remember that it's better to gap than overlap.
Repeat this on the other side of the dollar. Apologize to George Washington again, as this is the last time you will see his judging face.
Fold the dollar in half, meeting the tips of the folds you created. Notice that the eagle kind of looks like it's doing karate. Wonder if maybe you should do karate.
Take a moment to make sure that the fold is very precise, meeting the tips at exactly the right place. The future of this dollar depends on it. Don't let it down. Washington will be disappointed.
Take the bottom left corner of the dollar and fold it up to reach the center of the circle above the karate eagle. Make sure the line you create is straight. Use the angles above and below as a guide.
Take the top left corner and fold it in, just like you did with the bottom half. Match the lines you've created, making your dollar now look like a diamond. Or a square. Whichever one you prefer.
Now, take the bottom flap of the section you've just folded over, and fold it back up. Fold it as far back as you can, being careful not to rip your dollar. Make sure there's still a straight line.
This part can get kind of tricky. Observe the picture carefully. Take the part underneath the fold you've created and pull it out, but not too much.
You can see that there's a small pocket that you've created. Also there's a crease near the bottom, from where it was folded under. Don't straighten it out. Again, be careful not pull out too much.
From the outside of the pocket, gently push it in, and take the other side of it and pull it back as you do so. Use the creases as a guide of where to fold.
Flatten the section you've just folded, and still try and keep a straight line. The corner below might rip if you're not careful, so be sure to fold that part in as well. Crease it with your nails.
After making sure you've created sharp creases underneath, take your finger and stick it in the opening, while pushing the sides in with your other hand. It should gape open like this.
This is what the bottom should look like. These will be the legs of your frog.
Set your frog down on the table, and if it's sitting up by itself with the mouth open like this, then you've done it right. Now you can put a smile on your waitress's face when you eat out.