Things I didn’t know my children didn’t know until we went to the Museum of Communications:
- How to dial a rotary phone.
- How to listen for a dial tone.
- What a switchhook was.
- How to hold the switchhook down to hang up and then release to get a dial tone.
- That you had to lift the receiver to dial.
- What a busy signal sounded like.
- Why a busy signal existed.
