Mock Tutors:
Mr. and Mrs X decide to tutor Truman and Tuesday when they are failing their tennis and cooking classes, respectively, but they are less competent in those subjects than their children.

Meddle Mouth:
Tuesday panics when she learns that she has to wear braces, and Truman sees it as a golden opportunity to torment her by using one of his inventions to control her speech through her braces, thus ruining her date with Brandon.