Songs double as life lessons on “Sesame Street,” from an alt-R&B-pop track about gratitude with SZA to an acoustic number about feelings with Rapp. “SZA is really cool — really talented. And ...

“Here, they created a street ... to Sesame characters. “Mention Elmo, he’d turn to you,” she says. A naturally musical child, he watched episodes with glee, singing the songs.