As creatures begin their annual migration, Sid the Sloth (voiced by John Leguisamo) teams up with Manfred the Mammoth (Ray Romano) for protection. Sid and Manfred find a baby cast up on the banks of a river. When the exhausted mother falls back into the water, the two animals take care of the child. They intend to return him to his father in the human tribe as soon as they can.

A band of sabre-toothed tigers has designs on the child. The tiger leader sends his second in command, Diego (Denis Leary), to bring back the prize. Diego decides to go even further, and lure the trio of the child, the sloth and the mammoth into an ambush. The mammoth flesh would feed the entire sabre-toothed pack throughout winter.

Along the way, friendships develop between the small band of oddly assorted species. When Manfred saves Diego from a collapsing ice bridge over a raging volcano, the tiger experiences a crisis of conscience. At the last moment, as the ambush is about to be sprung, Diego warns his companions. Sid provides a decoy, and the plan is almost thwarted. The child is safely hidden, but the tigers attack the mammoth. Diego throws himself into the battle to protect his new friends. The tiger pack retreats, but Diego is wounded.

Sid and Manfred return the child to the overjoyed father. They then set off together into the wilderness. They are joined once again by Diego, who has recovered from his injuries.




The violence depicted in this animation is very discreetly implied with a light tone and a very low sense of threat or menace. Also, the humorous tone and stylised nature of the animation serve to lessen the impact of those scenes that contain violence. Only one scene has a darker tone - evil tigers attack the friends and the child - but the situation is resolved quickly. 

Content that may disturb children

Under 8

  • A human mother escapes a tiger attack, throws herself and her baby off a high precipice and into the water below. After clinging onto a branch in the water, she pushes the baby towards the Manfred and Sid in order to save her child.
  • The mother is swept away by the current and disappears into the water.
  • Manfred goes into a cave and sees paintings come to life, with shadow silhouettes of men hunting mammoth with spears. This makes him sad and brings tears to his eyes.
  • Diego dangles precariously off the edge of an ice floe, with ice breaking up around him. He is also in danger from a large volcano with flowing rivers of molten lava.
  • In an attempt to save Diego, Manfred falls into the fiery abyss himself, but is saved by a burst of hot gas that propels him back up to safety.
  • In a later scene, Diego seems to have fallen and possibly is stabbed by ice shards. The action occurs off screen.
  • Diego is shown lying, apparently injured, in the snow. No blood is visible. He tells the others to go on without him.

From 8-13

Some children in this age group could also be frightened by the scenes described above.

Over 13

Children over 13 would not be frightened by anything in this movie.

Sexual references


Alcohol, drugs and other substances


Nudity and sexual activity


Product placement


Coarse language 

This movie contains one example of mild coarse language.

Ideas to discuss with your children

This computer-animated feature-length film tells a lighthearted story with loveable characters based on prehistoric animals. The depiction of the animals and humans is not historically accurate. For example, many of the species shown in the film never actually lived in the same areas, let alone the same time periods. Nevertheless, the major themes of friendship, loyalty and courage will resonate with a wide audience.