Jenna, every puzzle should have some type of reset button. Which one are you on?
Edit: By third one, do you mean the puzzle with the geometric figures that you place to make a design? If they are in place and you can't move them, you put them in the right place. They won't stay put in the wrong place.
If you have any more problems, there is a thread in hints going also. It would be better to post there.