The other day I called a landline and heard a busy signal. And I realized that because of cell phones and call waiting, I couldn't remember the last time I'd heard one. And I grew up with them. So imagine what it's like for today's kids.

Mental Floss just put out a list of 11 sounds your kids have probably never heard. Here are some of the highlights...

  • A rotary phone dial
  • A typewriter
  • A camera flash cube
  • Changing the dial on a TV
  • A late-night TV station sign-off
  • An old-fashioned cash register
  • A film projector

Do you feel old now?  So do I.