The ending to "Verb, That's What's Happening": "To work (Verb!)/ To play (Verb!)/ To live (Verb!)/ To love (Verb!)" (Played as a boy runs home to his mom and they hug)
"The Tale of Mr. Morton", a Grammar Rock song — which teaches about subjects and predicates in sentences — about a man who falls for his female next door neighbor. When he's too shy and nervous to tell her how he feels, she takes the initiative. The song closes out on the two of them snuggling up as their bus drives into the sunset.
Mr. Morton was lonely
Mr. Morton was
Until Pearl showed up with a single rose
Who says women can't propose?
Now Mr. Morton is happy
And Pearl and the cat are too
They're the subject of the sentence
And what the predicate says, they do.note "They lived happily ever after."
Mr. Morton greeting his cat with a friendly "hello cat, you look good", and then later the cat delivers Pearl's note to him.
The ending stanza for "Three Is a Magic Number": "And there were three in the family/ And that's a magic number..." The animation to go with it too...the man and wife lovingly looking at their baby under the stars, then running through a field of flowers with the child when it's a bit older.
"The Shot Heard Round The World" is a proud, sentimental look back on American history that's all about the perseverance and determination that got the Colonials through the Revolutionary War. It's an incredibly heartwarming ballad about the birth of a nation.
There's just something about "Electoral College" that's extremely heartwarming. It's the triumphant reunion of the Schoolhouse Rock crew.
Meta-example. The series was just about the biggest thing ever in the 70s, but the creators were oblivious to this for many years. There was a Schoolhouse Rock convention of sorts at a college in the 90s, and the creators were approached and told, "I hope you know this, but Schoolhouse Rock defined my generation." They genuinely hadn't known that, having spent two decades under the impression that their series was just something kids impatiently sat through between real TV programs. There's just something extremely heartwarming about having this be a stunning revelation to them.