Your original text is mostly clear but can be improved for better readability and grammatical accuracy. Here's a corrected and enhanced version:
"The captions will name the functions of the lobes, not the lobes themselves; for example, vision, language, balance, etc. (see the text file). Each lobe will have more than one caption and should correspond to several buttons, except for the occipital lobe and the cerebellum, which will each have only one button. Next to the captions, draw fun characters to illustrate each function."
This version clarifies the meaning and improves sentence structure while maintaining the original intent.