Sounds Your Kids Probably Have Never Heard

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.