That was probably this:
https://en.wikipedia.org/wiki/Dick_and_jane
>>Dick and Jane were the main characters in popular basal readers written by William S. Gray and Zerna Sharp[1] and published by Scott Foresman, that were used to teach children to read from the 1930s through to the 1970s in the United States...The main characters, Dick and Jane, were a little boy and girl. Supporting characters included Baby (or Sally), Mother, Father, Spot (originally a cat in the 1930s, but a dog in later editions), Puff the cat, and Tim the teddy bear.
That’s it.