The parts...

Below is a picture of all the parts that we will need for our product (minus the walking cane).

In the middle of the picture is the Arduino microcontroller.  In the bottom-right hand of the picture is our ultrasonic range finder -- the LV-MaxSonar-EZ4.  To the left of that is a cell phone vibrator within a plastic housing that we printed out using Penn's 3D printer.