Continuity mistake: When Buzz is in Sid's sister's room, Woody comes up to it disguised in the Christmas lights. He then leaves them beside the door before he goes in. When they leave the room, the lights are gone. Later the lights return when Woody goes to get them, but there are fewer of them. (00:47:22)
Continuity mistake: The objects on Hannah's play table change position between two consecutive shots. Most notably Buzz's arm holding the teapot, as well as Buzz's legs. (00:49:20)
Continuity mistake: When Sid is setting the alarm clock, he sets it for about 8:25, when the alarm goes off the next morning, it's actually at 8:00. (00:55:42)
Continuity mistake: Buzz, while pushing the tool box off of the blue basket Woody is in, stretches to about 3 times the length he normally could from that position. When he first starts pushing against the window sill with his feet, he stretches out fully a few seconds later, about half the length of Sid's desk. He continues to push the box over and says "Almost there..." before he does and we can see he still has his feet on the window sill. Most people will have to watch it for a better understanding. (00:59:37)
Continuity mistake: When Buzz and Woody are in Sid's room, the clock stays still at 3:10. But about two scenes later that shows the clock, it changes. (01:01:20)
Continuity mistake: The match in Woody's gun holster disappears in the wide shot right before he and Buzz remember the rocket and the match, then it reappears in the closeup when he takes it out of the holster to use. (01:07:25)
Continuity mistake: Toward the end of the movie when Woody opens the moving van door and is hanging on it you can see in the background Scud trying to get Buzz from underneath the car, but right after Woody spots the box he needs to look in we are shown a scene of Scud struggling with Buzz who is at this point thrown under the car. (01:08:55)
Continuity mistake: When Rex and Mr. Potato head pop out of the moving box lots of packing foam pops out, yet later when the box spills out in the moving truck there is not any packing foam. (01:09:07)
Continuity mistake: When Buzz and Woody are attempting to enter the truck towards the end, they ride RC and grab a hold of Slinky to help pull them up. RC loses power and Slinky starts to be pulled onto the road. When he touches the floor to stop him falling he actually pushes against the flow of the road. (01:11:50)
Continuity mistake: When Buzz and Woody are riding RC, holding onto Slink in the end, there's a shot where the truck turns to the left on a bend. Slinky gets stretched further, and RC goes off to the right side of the road due to centrifugal force. We can see that RC is going to go under a parked car. The camera switches to the front and we see the car pass from further right. They never end up going under it and tangling Slinky in the wheel. (01:12:00)
Continuity mistake: There's an electrical outlet on the wall below the window (aligned with the window shade's loop) in Sid's room near the Megadork poster, but when Sid throws Woody to the floor and raises the shade (before he scorches Woody's forehead with the magnifying glass), that outlet has vanished.
Continuity mistake: After Woody tosses the string lights to Andy's toys at the window Mr. Potato Head hangs onto the end of it, but in the shot from behind Andy's toys when Woody's shaking Buzz's arm and imitating his voice, we see the outside of Sid's window and the string lights have vanished, then they reappear.
Continuity mistake: In Andy's room, the general ("generil") store box under the crib near the closet door has a cow illustration on its right side, but in the next few shots there's a drawing of two windows on that side of the box, and then it keeps switching between the cow and two windows in following shots.
Continuity mistake: In Sid's room, there's a lightbulb hanging over the table (which he turns on when he switches the doll's and pterodactyl's heads), and its electrical cord that hangs beside the lava lamp (filled with toy heads) vanishes and reappears a few times during the scenes there.
Continuity mistake: While Andy's falling asleep, when Potato Head and Rex pop out of the Eggman Mover's box it has "Andy's toys" written on one side and the adjacent side is solid - no openings, but when Woody opens this box in the moving truck, there are now open handle cutouts on the two adjacent sides to where "Andy's toys" is written.
Continuity mistake: At the start, when Andy uses the remote control to slam RC (and Woody) into the "bank" box it's pushed under the crib with all of its flaps open, but when Andy takes Molly and leaves the room all of the "bank" box flaps are closed up.
Continuity mistake: During the scenes in Andy's room, the light switch plate on the wall near the door vanishes and reappears in some shots.
Continuity mistake: While Buzz sets out to prove he can fly he slides down the loop car track, and in the shot from his POV the world globe is missing from the top of the dresser beside the door.
Continuity mistake: After Sid tapes Buzz to the rocket, when the thunder and lightning occur there's a shot of the window in front of Sid, and the window pane molding with the two handles at the bottom of the lower window is missing. When Sid walks over to that window it's back.
Continuity mistake: The blue blanket in Molly's crib repeatedly vanishes and reappears within the same scenes, such as when the batteries are put back into the baby monitor Woody shouts for everyone to return to their positions, in the overhead shot of the room the blanket's gone, but is soon back in its place.
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.