U rating and what applies

U: The U rating or Universal makes it suitable for all audiences ages 4+. This should be set within a positive framework and should offer reassuring counterbalances to any violence, threat or horror

Discrimination: discriminatory language or behavior is unlikely to be acceptable unless clearly disapproved of.

Drugs: References to illegal drugs or drug misuse must be infrequent and innocuous, or have a clear educational purpose or anti-drug message suitable for young children. Potentially dangerous or anti-social behavior which young children may copy must be clearly
disapproved of. No emphasis on realistic or easily
accessible weapons.

Language:Infrequent use only of very mild bad language.

Nudity: Occasional nudity, with no sexual context.

Sex: Only very mild sexual behavior for example, kissing)
and references to such behavior

Threat:Scary or potentially unsettling sequences should be
mild, brief and unlikely to cause undue anxiety to
young children. The outcome should be reassuring.

Violence:Violence will generally be very mild. Mild violence
may be acceptable if it is justified by context (for
example, comedic, animated, wholly unrealistic).