[We open on Jack-Jack levitating upside down in front of an amazed Edna Mode.]
EDNA: Oh, my God. Yes!
[Cut to Edna walking with his father, Bob Parr a.k.a. Mr. Incredible.]
EDNA: Of course you can leave the baby overnight. I'm sure filling in for Helen is challenging, and you are very tired and the other children need you and miss you, and you must go to them. Auntie Edna will take care of everything, so, drive safely and goodbye. I enjoy our visits.
[She pushes Bob out the door and it shuts behind him. Cut to Edna bringing Jack-Jack to the lab and putting him in a training room.]
EDNA: Okay, little one, show me the breadth of your many powers.
[As she goes to grab her clipboard, Jack-Jack disappears and reappears in front of Edna. The baby then disappears and reappears to a shelf of fabric rolls. He pulls one out and disappears into the floor. He reappears on top of the roll, and it rolls down. Jack-Jack disappears as it rolls him. Edna looks under the roll, intrigued by his powers.]
EDNA: Hmm... Curious.
[The roll is lifted up as we see Jack-Jack sitting by, laughing. Edna lowers the roll and Jack-Jack levitates up. She lifts it up, and the baby goes down. She lowers it again and the baby sticks onto the ceiling. We cut to Jack-Jack stacking building blocks at a fast pace before creating a model in his giant form. It crumbles apart and he cries. Edna hands him a bottle and he drinks it. When Jack-Jack hiccups, he vanishes. Edna grabs the bottle and takes a closer look to see a shrunken Jack-Jack on it. Cut to Edna throwing a ball at Jack-Jack, the baby vanishes like fog. Then, Jack-Jack turns into his metal form while Edna holds him, pulling her down. Next, Edna touches his water form, and he splashes apart. Then, Jack-Jack fires lasers from his eyes before spinning like a firecracker. This causes a power outage at the house, shutting off the lasers and allowing a raccoon to enter.]
EDNA: Electromagnetism. Hmm. That is all I need to see. The work begins.
[She puts on classical music and writes in her clipboard while Jack-Jack splits into multiple copies.]
EDNA: lnterdimensional teleportation.
[She then notices the copies wandering around. Edna grabs a few copies while muttering. One copy sucks on a remote and disappears while another plays with her glasses. She spots a copy on one of the needles of a machine. Another copy drops scissors into a burner and prepares to do the same for a fabric roll.]
EDNA: No, that is imported! (grabs the roll) From Tunisia.
[She spots three Jack-Jack copies riding around and groans in dismay. The fashion designer goes to the kitchen and searches through some drawers before finding a pack of cookies.]
EDNA: Oh! Hobnobs.
[She returns to the lab to offer cookies to the Jack-Jacks.]
EDNA: Cookies. Delicious cookies.
[The babies all waddle toward Edna and she throws them cookies.]
EDNA: Get back. Back, you beasts. Back!
[Once she’s done, the babies all cry for more cookies.]
EDNA: That is all the cookies I possess. Now, get yourselves together.
[The copies growl angrily and merge together before turning into a monster. Jack-Jack chases Edna around before the designer enters the training room, shutting the door in front of the baby. The monster baby growls and ignites on fire, running around like crazy.]
EDNA: (gasps) My God. Fascinating.
[Edna sits back and watches as Jack-Jack wrecks the place. Soon, the baby is exhausted and falls asleep in his normal form. Later, Edna sets the baby down in bed and begins work on his super suit. Soon, it is finished. Later...]
EDNA: Okay, come out and show me.
[Jack-Jack comes out and walks in his new super suit like a fashion model.]
EDNA: Work it, yes. There it is. The room is yours. They are lucky to be in your presence. Now, the turn.
[Jack-Jack turns and walks the other way.]
EDNA: Yes! You are a tiny god.
[The baby giggles before noticing a nearby beeper going off.]
JACK-JACK: Dada.
EDNA: Dada is here. (hands him a lollipop) Let's show him how fabulous you look.
[He sucks on the lollipop. Later, Bob is leaving the building with Jack-Jack.]
BOB PARR: Thanks again, E, for everything. How much do I owe you for...
EDNA: Oh, pish-posh, darling. Your bill will be covered by my fee for being Mr. Incredible, Elastigirl, and Frozone's exclusive designer throughout the known universe and until the end of time. But babysitting this one, I do for free, darling.
[Bob drives off in his car. As Edna waves goodbye, she then notices Jack-Jack next to her, waving bye to his dad.]
EDNA: (gasps) Robert.
[She carries Jack Jack and runs after Bob’s car.]
EDNA: ROBERT!!
[The iris closes on Edna and Jack-Jack before closing to black. Roll credits.]