Characters developed for an short animated film called 'Gajar ka Halwa':
• Basic Sketches of an old man:
• Developing the armature using thermocol and aluminium wire.
• Thermocol carved out to animate mouth.
• After applying m-seal and foam. Foam has been used to give volume to the character.
Also, you can refer to this link for another example:
This wire armature is not good for a long duration film as aluminium wire is not that durable and if you’re planning to make feature film may be then you need to make several models like this or if you have the budget you can even buy a ball and socket armature.