《疯狂原始人》是讲述一个原始人家庭冒险旅行的3D喜剧动画片。原始人咕噜一家六口在老爸Grug的庇护下生活。每天抢夺鸵鸟蛋为食，躲避野兽的追击，每晚听老爸叙述同一个故事，在山洞里过着一成不变的生活。大女儿EEP是一个和老爸性格截然相反的充满好奇心的女孩，她不满足一辈子留在这个小山洞里，一心想要追逐山洞外面的新奇世界。

　　《疯狂原始人》经典台词

　　Guy: This is called a brain. I think that's where ideas go.

　　Thunk: Dad, I don't have a brain.

　　"Eep: My name's Eep and this is my family, the Croods. We never had the chance to explore the outside world because of my dad's one rule:

　　Eep: Never leave the cave.

　　Grug: New is always bad. Never not be afraid!

　　Eep: We never had a chance to explore the outside world, but what we didn't know was that our world was about to change."

　　"[Gran tries to eat Belt, the sloth, but Belt pulls a knife on Gran.]

　　Guy: Don't do that. He's not food. He's a pet, my pet.

　　Gran: What's a pet?

　　Guy: An animal you don't eat

　　Gran: We call those children.

　　Eep: [Smitten with Guy] Isn't this fun? We're taking our first trip together."