Components:
- A screen! OLED (easy) or E-ink (never used it)
- Several buttons (unknown, probs 2 or 3)
- Some kind of radio frequency communication (but could settle for other wireless components) + antenna
- A piezo or small vibration motor / solenoid
- Small LEDs
- ATTiny / ATMega if need too many pins
Future shapes
3D Printed Star Trek Communicator