When they catch it, they can call out any question in their vision on the ball (no turning the ball around). Have students stand up in a circle and toss the ball around.
Write Socratic Seminar question starters on the ball (see picture)
Here’s a cheap soccer ball on Amazon: Soccer Ball (affiliate link) It can be used with any text, and the gist is this:
This has been one of my most popular strategies of the years and rightly so! It’s a great tool to have on hand and toss around when students start to lose focus or drift off during reading time.