The "by using" is stilted but if she watches many educational or nature videos, narrators seem to use the most arcane and convoluted sentence structure as they draw the story out, e.g. "the chimpanzee is fending for himself by using a stick to pull ants out of the tree trunk."

"Zipper up?" That's strange. I can't even see "Zippers up!" being used as a command. "Zip up?" Sure.