It was thus said that the Great JP Hindin once stated:
There were three boys, I believe. The head kid was called something like
"Hercules", either as a first name or a nickname. He was a "chubby"
kid,
and when he was a toddler was in a series of TV adverts, or perhaps a
programme, which is recurringly mentioned in the books.
Their clubhouse was in a junk yard one of their fathers owned, where they
built things to help them go through their adventures. I remember they had
a printing press they repaired from the junk in the yard. I think the
clubhouse was an old trailer home, or perhaps a caravan?
The Three Investigators. You're thinking of Jupiter Jones, and the other
two boys were Bob and Pete (forgot their last names). They used to be
associated with Alfred Hitchcock but (I think sometime during the 90s)
Alfred was removed from the books.
I used to collect them, but gave away my collection to a younger cousin
over a decade ago.
-spc (And now wish I had kept them ... )