Perhaps some of the explanation for the Flintstone Vitamins continued success is in their nostalgia for the generations of children who grew up with them — and who are now parents themselves. There’s even a Facebook group for those who ate the vitamins as a kid. And then there’s that jingle — “Ten million strong and growing!” — which, incidentally, was composed by Martin O’Donnell, the same guy who composed the music for the intensely popular Halo video game series.
Mental_floss takes a look at how the vitamins came about and how they've changed over the years -including the saga of the Betty Rubble vitamin. Link