We really need a way to handle missed chores beyond the "Redo" option. A few ways to improve this: 1) Simply allow us to delete past chores individually if they weren't completed; 2) Add a "Reject" button in addition to or instead of the "Redo" button; 3) Allow the ability to set a deadline for the chore to be completed - if the kid doesn't get it done by the deadline the chore disappears or grays out and can't be checked as "Complete". Make it happen!