For More Details:
You can refer to the following major  books on clay animation:

• Clay animation-American Highlights from 1908 to present by Michael Frierson
• The Art of Clay Animation- it’s history, artists and techniques by Frank T. Thompson
• Creating 3D Animation- The Aardman book of filmmaking by Peter Lord

Clay Used: Fun clay (or Kores) by creations.

Also, for a detailed understanding of lip syncing, refer to the module called ‘Lipsync in Animation’ by Samidha Gunjal.

Or click the link below:
Design Course on - Lip Sync in Animation