Op Art is so much fun to study with your students (I'd say 2nd on up!). There are so many interesting works to look through, and so much inspiration to be had. Think about things you are trying to cover (standards/skills/elements/principles), and focus your lesson in that direction. It really is so versatile.
If you need to bounce ideas off of someone, leave me a comment here or find me on my other social media. I'd be happy to help.