Pleo's eyelids open and shut and his eyes move up and down. His mouth also opens, and when he detects something (like food) in his mouth, he clamps down and acts like a dog playing tug-o-war.

There is a speaker in his mouth and microphones on either side of the head.

We only have one Pleo, so we don't know what the IR transmitter is capable of.

The head contains a 32-bit NXP RISC LPC2103F microcontroller.