Random Picker

Given how I typically use this in class. It would be great if when looking at a seating plan there was a much bigger button to click to select next random student. Also would be great if the student selected could be given a bit more prominence to be easily visible.
I often use this to randomly do quick fire questions at start of lesson and the button to click on each time is a bit small when walking around class and also sometimes difficult to spot who is selected.

Thanks,
Jason.