The funny thing was, we picked the Pooh one because it seemed the least annoying. My sister loves Winnie the Pooh, and as repetitive cartoon voices go, Pooh's is about the least grating I can think of.
Leave it to genius baby to figure out that repeatedly pushing the same button makes it extra annoying
ETA: Haha, my brother in law, who left the message just emailed. "You're just lucky I didn't have another hour to kill."