One Elegant Way to Teach at a Museum

The Colorado Railway Museum has a cell phone system for visitors to get descriptions of the artifact before them.  The visitor calls the phone number on the first sign they encounter (see picture below) and gets a brief welcome/introduction from the Executive Director and then is asked to enter the number of the sign (here 15) and is given a description of  the artifact.  The visitor "redials" at the next sign, enter the sign number, and gets a description.  The map of the museum has the numbers also.

You can try the system out using the web address on the sign.

Elegant in its simplicity!