Change state of object on Slide Master

Hi Peter.  I really dont want to bring the learner back to a menu screen.  Most of my sections are 20-25 slides in length. 

However, the video did give me some ideas on using variable to change the state of objects.  I am thinking of having a series of hidden checkmarks that become "normal" once the variable changes to true.  This may give the illusion of the menu item changing state.

Thanks.