Do you like to pursue study ? how old you still study?

I started college at age 35, when my youngest child started school. I studied for several years and then went to work so I had to give up school. Now that my youngest has graduated from high school I have thought about returning to college as a part time student but I'm still not motivated enough to put in the time and effort that would take. I believe that one is never too old to learn. When I was in college I had a classmate who was in her 80's and she had an easier time with the course than I did as I recall.