I had to comment on these. My elementary school brothers and sister are required to read at home everyday for 15 minutes. These bookmarks have been a lifesaver since we can let them push start and read to whomever is making dinner; when the chapter or minibook is over they can just push stop and voila! We know exactly how long everyone read for without trying to keep track of 3 kids, 3 stories, and 3 clocks.

This would also be great for those required summer reading books...

I think it would be good for ME. I tend to get lost in books and loose track of time. Though, I often just use a simple kitchen timer for this purpose.