Sesame Street has added two black characters to its cast to educate children about racism.
Father Elijah and his son Wes were brought in as part of a new series called ABCs of Racial Literacy.
It was launched by Sesame Workshop, the not-for-profit behind the popular children's show, as "part of its commitment to racial justice".
The Sesame Street Twitter account released a clip of Elijah and Wes speaking to old favourite Elmo.
In the video, Elijah and Wes take a break from a walk to explain why people have different skin tones.
Elmo picks up two leaves, observing one is the red of his fur, while another is the brown of Wes' skin.
"Good observation, Elmo," Elijah says, before explaining: "Melanin is something we each have inside our bodies that makes the outside of our bodies the skin colour that it is. It also gives us our eye and hair colour."
He adds that "the colour of our skin is an important part of who we are, but we should all know that it's OK we all look different in so very many ways."
Elmo observes "leaves that are all different colours", before Wes adds that "the different colours all look really cool together."
Elijah continues: "When people of all colours come together, we stand strong, like this tree."
Sesame Street took a stand against racism over the summer in the wake of the death of George Floyd.
"Racism has no place on our Street - or any street," the show wrote.
"Sesame Street was built on diversity, inclusion, and, especially, kindness.
"Today and every day we stand together with our Black colleagues, partners, collaborators and the entire Black community.
"We stand with our friends around the globe to speak out against racism, to promote understanding and to create a world that is smarter, stronger and kinder."
The show has a long tradition of dealing with difficult topics in a way that children can understand.
When Will Lee, the actor who played Mr Hooper, died in 1982, the writers chose to centre an episode on the concepts of death and grief.
In 2002, the South African version Takalani Sesame, introduced a five-year-old HIV-positive Muppet, who was also an orphan.
In 2019, Karli was brought in, whose mother battled addiction issues, while four years prior, the first autistic Muppet debuted.
