Conversation so far:
How did Kevin Clash get his start?
Kevin Clash developed an interest in puppetry at an early age and, in his teen years, performed for local TV children's shows in his hometown of Baltimore, Maryland.
How was Kevin Clash discovered?
While appearing at a neighborhood festival, Kevin Clash was discovered by Baltimore television personality Stu Kerr.
Where did Stu Kerr hire Kevin Clash?
Stu Kerr became Kevin Clash's first mentor and hired him to perform in the children's show Caboose at Channel 2.
What was the puppet for the children's show Caboose?

Question: How long was he there?
Self-contained rewrite: How long was Kevin Clash on the children's show Caboose?