Jess,
Sure, if you use PPT2002/2003 you can add two emphasis effects to the
object. First add the spin effect (basic effects) then select the object
again and apply the grow/shrink effect (also in basic effects), set it up so
it starts with the previous effect, double click the effect in the task pane
and apply the percentage of growth you want if necessary type a custom
growth percentage.
Luc