How do puppets do all those things that make them look so alive? That's the work of this week's guest- puppet engineer Randy Erskine. Randy works for Selberg Studios helping build hand-crafted puppets that have been used by puppeteers around the world. (You also might have seen their work in the movies Best in Show and Goosebumps.)

For more information on Randy and his impressive work, check out the Selberg Studios website.