Bill stayed very busy from the sixties until the end of his career recording a variety of short features that were distributed at no cost to radio stations across the country, first on vinyl records and later on cassette tapes.  These typically lasted no more than four minutes, and were sometimes much shorter.  Sponsors footed the bill for the programs in exchange for brief mentions at the beginning and end of each episode.     
The first four series listed below were produced by the Robert G. Jennings Corporation (later Aerial Communications, Inc.) and tended to be general interest programs with little connection between sponsor and content.  The ones after that were produced by David J. Clark Enterprises (listed by some sources as Celebrity Radio Productions). These shows more cleverly incorporated content that expanded on the sponsor's own message, so that the entire program worked as a marketing tool.  These were essentially early versions of what would become known as infomercials.  Bill was one of many celebrities hosting programs for David J. Clark.  Others included Peter Graves, Florence Henderson and Chuck Connors.

Thanks to the generosity of Fred Wostbrock, we have dozens of examples of this unusual part of Bill's career from Bill's personal collection.  Over the years, we've managed to add significantly to the collection. We're also pretty sure that the picture above is from Bill's work on these syndicated shows.  However, we don't know who the man is sitting beside him.  
Celebrity Radio Productions remains active today, producing a variety of series that mostly target an older, middle-America audience.   
CULLEN'S ADVENTURES                 
September 30, 1963 to January 2, 1970                
The first of these series, as well as the longest running, this was a four-minute informational program sponsored by Grollier's Encyclopedia.

Despite the title, there was nothing adventurous about the program.  There wasn't even musical accompaniment.  For each session, Bill gave four unadorned minutes of interesting facts and unusual trivia about a subject.  Subjects could be almost anything: Mount Everest, centipedes, hair dying, youth hostels and sorcery were discussed in one week.  Since episodes were designed to play on a specific date, anniversaries of famous events would frequently be topic material.

We have hundreds of episodes from this series, some from Bill's personal collection.  Based on the numbering of the earlier episodes in our possession, we believe the program began September 30, 1963.  Its 1,635th and final episode aired on Friday, January 2, 1970.  The final record provided to stations included only one week's worth of programming instead if the usual two.  The following Monday, Bill began hosting the similar Knowledge Mod Style.

Opening to a piece about Ralph Waldo Emerson

IDEAS FOR BETTER LIVING                  
March 22, 1965 to 1968?                 
Bill and his fellow I've Got A Secret panelist Betsy Palmer shared the microphone for this one.  The title is self-explanatory. The pair chatted away on such subjects as medical care for your pets, the meaning of happiness, imaginative children's toys and -- frequently -- the differences between men and women in various endeavors.  We have six weeks of shows from the spring of 1965, and one week of shows from June, 1968, all sponsored by DuPont.  We don't know for how long the series was produced.

Bill and Betsy look at happiness
January 5, 1970 to late 1971? 
Similar to Cullen's Adventures above but at half the length, this two-minute feature began with a question that had been submitted by a caller, followed by Cullen offering the answer to the query.  The only thing remotely "mod" about the feature was the brief bass-beat theme music.  We have a couple dozen records covering hundreds of episodes.  The show ran at least through April, 1971.

An entire two-minute segment about the sound of the human voice
September 23, 1972 to December 22, 1972 
A thirteen-week series of four-minute segments which focused, as the title might suggest, on human interest stories in the world of sports.  Stories tended to center on then-current subject matter, though historical items would be discussed occasionally.  Legendary sportscaster Red Barber replaced Bill for twenty shows in the middle of the run, from November 6 to December 1.

Helbros Watches sponsored the series, and each episode featured a plug for a sports-themed Helbros contest, for which the grand prize was a trip to the Super Bowl.   We have the entire series.

Bill talks baseball

Two-minute-long human interest profiles, sponsored by Nestle.  We don't know any more about this feature, and have no examples in our collection.   
November, 1982     
Five two-minute Thanksgiving stories produced for the National Goose Council.  Given the sponsor, it's not surprising that the stories pointed out the role of the goose in history, and the bird's superiority to turkey as a Thanksgiving meal.  We have the entire brief series.

Bill shares some goose propaganda
This David J. Clark offering was a little more blatantly commercial than the others.  According to a tape case provided to us by fellow collector James Owen, Fuji Facts with Bill Cullen was "25 1-minute tips on Photography, Video and Computer Use".   Jim remembers this being offered to stations around 1987 or so.  Roger Munyon was able to provide us the actual recordings for this program.

Bill offers some brand-specific photography advice
Another two-minute series, this one on child-raising tips and sponsored by Johnson & Johnson.  Through Ebay, Bill's personal archive and fellow collector Kenneth Johannessen, we have forty weeks of shows, mostly from 1987 but including four weeks from October, 1985.
Radio vet James Owen tells us he remembers playing The Parent's Notebook in 1985, and he thinks the show might have started even earlier.  He says they were irregularly provided to stations.  We learned from documents associated with the discs that 160 episodes were produced in 1985, scheduled to air between March and October, and that the series was scheduled to resume in March of 1986.  (We have no 1986 discs.)    Oddly, the program numbers on the documents do not match the program numbers on the discs.  Program 160 according to the documents is identified as program 560 on the discs.  Presumably, that means an additional 400 episodes had been produced previously.  For some reason, the numbering started anew in 1986, and by September, 1987, an additional 350 episodes had been produced.  All told, this series may approach Bill's first syndicated series, Cullen's Adventures, in total episodes produced, though at only half the length of that original series.

In an October 7, 1988 radio interview, Bill mentions that he's doing a syndicated radio show for Johnson & Johnson, almost certainly this same series.  Whether he was actually recording additional episodes at that point is unclear.   Nevertheless, this would be Bill's last professional work.

Bill offers parents playpen advice