GO!
Your 6YO will LOVE, LOVE, LOVE him....
I went to DTD w/my 10YO a few weeks ago....after DTD, I said, "Let's go see if Bob is playing tonight." My 10YO had not seen Bob since he was FOUR so of course he didn't remember anything.
He had a blast! Especially when Bob broke into SPONGEBOB SQUAREPANTS!
We are going in September, and I just rescheduled our luau to the 5:30 show so we could see Bob afterwards...I'm taking ALL THE KIDS in our group this time!
HE IS NOT TO BE MISSED!