Just like the original movie and sequel movie, the end credits are alongside drawings made by the children of the Blue Sky employees.
When the 20th Century Fox logo appears, the X in the logo got lit up. This is similar to the Fox X-Men films, where the X in the logo stays for a second longer when the logo fades away.
Just like the previous two films in the franchise, the acorn is shown right at the end of the credits, only to statically disappear like a glitch.
During the first half of the end credits, a scene shows Scrat continuing to struggle inside the spaceship.
There are no opening credits beyond the title. As was the case for previous films in the franchise.