It’s twins day and everyone is celebrating on Sesame Street! Chris explains to Abby and Zoe that a twin is someone who has a sister or a brother who was born on the same day. Then, he introduces his twin sister, Christy! They love to tell private jokes and share a special bond. Abby and Zoe decide they want to go to the party too so they pretend to be twins and do everything the same. They both try to stand on their hands and balance on one leg, but they aren’t successful. They decide to ask Chris and Christy for help, but the party has already started. Meanwhile, the Count counts all of the identical and fraternal twins. Chris and Christy explain what identical and fraternal means and now Abby and Zoe decide to become identical twins by wearing the same outfit! Since they can’t agree on a common outfit, Abby uses magic to make them look identical! Now they look like twins, but they still aren’t the same because Abby can’t spin and Zoe doesn’t have a pet rock. Once Abby changes back to herself, Chris takes them to the twin party to show them that twins can do different things even if they look the same. Abby and Zoe finally discover that they both love to jump. They become the jumping twins and join the party!