First, think about the characters you love from the Ice Age movies. Decide which ones you want to focus on. Then, come up with a simple idea like a new adventure or a problem they need to solve. For example, you could start with Manny and the gang finding an unknown cave. After that, just start writing and let the story flow. Don't worry too much about grammar at first.
To start writing Ice Age fanfiction, begin by researching the Ice Age world. Watch the movies again to get a feel for the environment, the different species of animals, and their personalities. Next, create an outline. It could be as simple as 'Intro - Problem - Solution - Ending'. For the intro, you might describe the setting, like a cold and snowy landscape. Then, introduce your conflict, like a shortage of food. As you write, use vivid descriptions to bring the Ice Age to life.
Well, starting Ice Age fanfiction can be really exciting. You should first choose a theme or a central idea. It could be about survival, friendship, or discovery. Once you've got that, think about how you can introduce new elements while still staying true to the spirit of the Ice Age. For instance, you could introduce a new type of predator. Then, start building your story around your chosen characters. Describe their actions, thoughts, and feelings. Remember to give your story a unique twist. Maybe instead of the normal group dynamic, you change it up a bit, like making Sid the leader for a change.