This thing is packed with interesting stuff!

Dome

• PIR sensor
• 2 microphones, 1 left and 1 right (for body reaction only?)
• LED for the beamer
• two LEDs in the front
• ultra-sonic range finder
• PIEZO in the top (tap to wake up)

Body

• Speaker
• another microphone
• dome motor
• 3 IR photo sensors for dome position check
• leg motors
• switch acting as "brake" / bolt