There were multiple sets consisting of Mr. Heart and his child. Some of the time the child was the twin boy as in the Disneyland set, and some of the time as in the Surprise Party set Dad was packaged with the twin girl.
Set #9079 and #9719 from 1985: Dad and Baby
Set #2382 from 1986: Surprise Party
Set #3141 and a foreign release Kiss & Cuddle from 1987
Set #4617 and #4752 from 1988 Bathtime Fun
Set #7556 and #7606 from 1990 Heart Family Visits Disneyland