Large TRIBBLES (batteries included) have been trained to respond to sound or touch with a soft “coo” and excited wiggle. But if you continue to pet them, they’ll emit an annoyed chirp!
 
SNAKE TRIBBLES have evolved to mimic one of the most voracious of all reptilian predators, locally called “gzorkles.” The gzorkle is essentially a loner, so the patterns on these TRIBBLES deflect their attentions!