The LCD Navigator Projects Kit contains the components for a breadboard friendly open source project that has an LCD and 5 buttons used to navigate through menus shown on the LCD. You can think of this as a tiny computer terminal and keyboard: a very minimalist (read cheap) one for the AVR.
1 – LCDNAV Printed Circuit Board
1 – LCD Screen (2 lines by 8 characters per line)
1 – Potentiometer (to adjust LCD contrast)
5 – Pushbuttons (up, down, left, right, and select)