I know I probably don't have a very strong opinion on this subject, since I'm only 15, but still, if the box says "Ages 4+" then nobody could possibly be too old. I went to Target yesterday looking for a HA Jazz, and after I snatched one up, I turned around and noticed several Generations figures, as well as the new Star Wars line of classic figures (I had to restrain myself from grabbing Drift, Boba Fett, and Han Solo). I immediately began to smile and rapidly started to sorting through every toy on the isle (I DID make sure no little kids were around, because I didn't exactly want to freak them out or anything).
Anyway, like I said. Nobody's so old that they lose "The Touch".