Kangaroo field goal kicks one of the students (Or Katie the yellow yak) through the air.

A man is thrown about and is pinned by heavy furniture.

A scary vulture attacks an elephant to take a flower from him.

The mayor gets a stapler stuck to his head. Twice.

While believing that the flower in question does not contain a world of people, a villain that is hired to destroy it promises his new boss that he will "devour" the flower, then "regurgitate it", and then "devour it again". (used for comedic effect)

In the audio commentary for one of the deleted scenes (on the special edition DVD and Blu-Ray), there is a mention of a literal "asskicking machine".

None.

The ending is chaotic and somewhat violent.

The voucher and his attack may be frightening to children.

The Sour Kangaroo and Wickersham Brothers are very mean and frightening characters that will possibly scare some small children.