How to Make Text Jiggle in PowerPoint 2007
Type the text that you want to jiggle.
Use the Font drop-down list to choose a typeface.
Use the Zoom control at the bottom-right corner of the screen to zoom in to 400%.
Zoom in so you can draw a tiny motion path.
Click Add Effect and then choose Motion Paths→Draw Custom Path→Scribble.
The cursor changes to a little pencil.
Draw a tightly knit scribble pattern right in the center of the text.
Go back and forth and up and down quite a few times to make the jiggle effect appear to be random.
Open the the Custom Animation task pane
This brings up the dialog box that lets you set the timing options.
Change the speed to Very Fast and the Repeat drop-down to Until End of Slide. Then click OK.
It’s that easy!