After the first two parts, I had high hopes with the third part and feared that it may not be as good as the first two - They were great. This movie may not be as good as the first two, but it certainly is entertaining and takes the story of Ice Age forward.
Here Manny and Ellie are having a child, diego feels that he is losing his sharpness by staying with the herd and wants to leave while Sid just feels lonely because now Manny and Ellie will have a family of their own and Diego's leaving. Once again it is Sid, who somehow manages to bring everyone together for the adventure of a lifetime, by his misadventures.
One common thing about all the three movies are that they are about certain journeys, here it is through Dinosaur Land. It is through these journeys that they introduce new characters who are as lovable as the original ones. So it remains to be seen what kind of a journey they present in the fourth installment which is a certainty considering the success of the franchise.