Easter egg: In the two-disc deluxe version, go to the root menu, highlight the first item; press the right navigation arrow and the knob on the TV highlights. Press enter to watch the Buzz Light Year TV commercial from the movie.
Easter egg: Go to "index" and select the star in the lower left hand corner (I think) this takes you to a screen that has a lot of titles on it. Press "play all" they are little movies like happy meal toys of Buzz Hamm Woody and Rex. They are also in stars all over the DVD (special edition disk 2).
Answer: Baby face taps RR TOYS COME OUT. Telling the other toys to come out from hiding. Pixar stated this in their Toy Story character overview.
But why "RR"?
"RR" is shorthand for "Message Received." Babyface is telling Woody that he understands Woody's problem and then taps out to the other toys to come out.