Elmo volunteers to find a friend who is round so Rocco, Zoe's pet rock, can have a play date.
Elmo and Zoe have an arts and crafts play date, but Rocco, Zoe's pet rock, is upset that he doesn't have his own play date. Elmo volunteers to find a friend who is round for Rocco and brings in a balloon. But Rocco wants a friend with a face and hair. Alan overhears the problem and suggests using arts and crafts to make Rocco a friend. Together, Elmo and Zoe use stickers and cotton to make a face and hair on the balloon. Rocco tries to play with Balloon-o, but Balloon-o floats away. Alan sees what happened and explains that Balloon-o floated away because he was filled with helium, which is lighter than air. Elmo tries to find Rocco a friend made of something that is heavier than a balloon and is round, so he returns with an egg. An egg is an oval but it will do. Zoe and Elmo draw a face on the egg with crayon and give it boots and a hat. Rocco begins playing pat-a-cake with Eggy, but Eggy accidentally breaks. Alan explains that Eggy broke because egg shells are very fragile. Elmo now needs to find a friend who is not too light or too fragile and is round. He notices Alan grabbing for a round sponge and thinks that the sponge could be the perfect play date friend for Rocco. Elmo explains that a sponge isn't lighter than air so it won't float away, and it's not fragile so it won't crack. Together, Zoe and Elmo create a face for Spongerino using stickers, paper, an eraser, and string. Now Rocco has the perfect friend to play with.