Zoe has always been very sensitive to sounds and very aware of different sounds. Sometimes that's not so good, like when she freaks out if I turn the dial on my iron or when I use the can opener.
But sometimes it's pretty cool! She wants to know what every little tiny sound is, and sometimes I don't even hear what she is listening to until she points it out. Most recently she has been interested in the sounds the cicadas make. I told her those were bugs in the trees singing, and that they were called cicadas. Now when she hears them she says "sound cicada!" very excitedly.