Before you animate the characters and objects in your scene, set up the scene by rigging all your characters and by applying the appropriate constraints and deformers to all the objects you want to animate.
Rigging a character, also known as character setup, involves creating skeletons for your characters, binding skins to the skeletons, and setting up deformers and constraints.
Non-character objects are also very important when bringing your scene to life. You can limit and control the transformations of objects by constraining them to characters or other models in your scene. You can also create deformers for objects to create deformation effects. For example, you can parent constrain a ball to the hands of a character.