A character is hit on the head and gets amnesia, which can only be cured by another bump on the head. A father character decides to teach his son how to fight, purely for self-defense against the school bully. A neighbor borrows yard grooming equipment and fails to return it. A student has a crush on the teacher, forcing the teacher to let the student down gently, without causing embarrassment. A father character decides it's time for his child to learn the value of money.
Someone has two dates at the same time.
Rather than rescheduling, the character attempts to go on both dates at once, failing hilariously. A child breaks something and glues it back together, hoping mom and dad won't notice. A practical joke goes too far. Ultimately, the child realizes that if it means behaving that way to be in the group, then maybe the group isn't worth being in. Quarreling roommates agree to solve their problem by drawing a line across the center of the room and staying on separate sides.