Press the keys: A, B, C, or D.
Here's one way to make your own talking photos:
1) IMPORT a picture.
2) Click the SOUNDS tab and RECORD your voice.
3) Animate the mouth. (Click the COSTUMES tab, then duplicate the costume with the stamper tool - or by choosing duplicate from the right-click menu. Next, EDIT the copied costume in the paint editor so the mouth looks open).
4) Use the script in this project to play sound and switch between costumes (or write your own script).