As far as tie in activities I like the idea of doing a blindfold activity....might open up some discussion opportunities for people with visual impairment. One book has an experiment on how glasses work that I hope will be interesting as well. Building a kaleidoscope might be a fun activity as well.
neat lesson plan from scholastic for The Magic School Bus book:http://www.scholastic.com/teachers/lesson-plan/magic-school-bus-explores-senses-storia-teaching-guide
I'm also considering adding an eyeball dissection to the activities list....might be too young...but maybe not. I found a neat resource for the process anyway.
videos about the eye:
Bill Nye eyeball short
Neat anatomy video
More in depth anatomy
rods and cones short
TED ed vid on evolution of the eye
playdough model activity
confetti maker cones and rods rolled into retina layer... idea in progress.