1. Furby Autopsy Dr. Jones Department of Programs and Objects
The Tech Museum of Innovation

2. The Victims

3. In case you were wondering what was behind that random animal-like toy with humanoid traits, a body metaphor might help:
Organs (eyes, ears, heart, muscles)
A nervous system (brain, sensors)
A musculoskeletal system (bones, muscles)

4. Just like humans, babies and adults differ in structure
Notice Ear bone difference and tummy color

5. The following pictures should help you through the process
Keep an eye out for these body parts
Switches
Sensors
Motors
Gears and Cams

7. The Nervous System
The nervous system of the Furby consists of a PC board and input devices that include sensors for light and sound and output devices such as a speakers and moving parts.
Figure from

8. The Musculoskeletal System
The Furby moves based on a combination of the movements of gears, cams, switches, and screws
Cam-a rotating disk shaped to convert circular to linear motion or a rotating mechanism
Switch-control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit
Armature – coil used to induce voltage by motion through a magnetic field
Motor –converts mechanical energy

10. Task at hand…Identify parts
Switches (5)
Sensors (3)
Microphone
Speaker
Motor
Now, see if you can put him back together.
Pet switch--microswitch mounted on main PCB
Inversion switch--mounted on main PCB
Tummy switch--strip metal leaf switch mounted on top of speaker.
Tongue switch--microswitch behind mouth
Stroke switch--small leaf switch which monitors position of main gear system
Light sensor--photocell in forehead
IR sensor--in forehead
IR send--IR LED in forehead
Speaker--about 1.25 inch speaker mounted to belly. (Sound quality is not really any better without the fur)
Motor speed sensor
Microphone--small (0.33 inch) mounted in the side (to furby's right). It's unclear how clear the furby "hears" -- it could be listening for specific sounds, or simply hears "loud" noises as single bit of input. I've never noticed that Toh-Loo-Kah could differentiate sound other than to respond generically to any loud noise, so I suspect the Furby's auditory capabilities to be pretty basic.
DC open armature motor--reversible
reset button--on bottom