Plot

The imagination of a wildly creative girl comes alive in an amusement park.

June, an optimistic, imaginative girl, discovers an incredible amusement park called Wonderland hidden in the woods. The park is full of fantastical rides and talking, funny animals - only the park is in disarray. June soon discovers the park came from her imagination and she's the only one who can fix it, so she bands together with the animals to save this magical place and bring back the wonder in Wonderland.—Wulf97

June Bailey (Brianna Denski), an aspiring girl with a bright imagination, and her mother come up with the story of Wonderland, a magical amusement park run by a group of animals: Boomer (Ken Hudson Campbell), a big blue bear that greets guests; Greta (Mila Kunis), a wild boar; Gus (Kenan Thompson) and Cooper (Ken Jeong), beaver brothers; Steve (John Oliver), a porcupine who is in love with Greta; and Peanut (Norbert Leo Butz), the leader of the park and a chimpanzee that has the ability to create rides by listening to June's mother's voice. All of these animals are plush toys in June's room.

Clockwork Swings is the main ride of the park. Activating the Swings also opens the park. The park has a transportation system called SkyFlinger. The passengers sit in a glass bowl, which is picked up by a mechanical arm and thrown over a long distance, where another mechanical arm catches it and puts the glass bowl on the ground. The mascots of the park are the WonderChimps. They come in the shape of dolls with over 5200 outfits to choose from.

Mrs. Bailey and June imagine together a new ride in the shape of a carousel, with flying fish that riders could use to travel all over the park. June gives Peanut his marker, and Mrs. Bailey whispers the instructions in Peanut's ears, and he proceeds to create a new ride for the park. Mrs. Bailey says that Wonderland could be real, and this inspires June.

Banky (Oev Michael Urbas) is June's best friend. June works with Banky to create her own "real" version of Wonderland in her backyard. June creates a really elaborate roller coaster linking up several backyards in her neighborhood. He then rides the coaster with Banky, but the coaster car ends up going out of control and causes damage to the backyards and fences of almost all neighbors. The sheriff suggests sending June to military school. Mrs. Bailey refuses to discipline June and asks her to create Wonderland in a way that does not destroy the neighborhood. Together, they create miniature versions of the Wonderland rides inside their home. They recreate all of the ride inside the home, and June comes up with the idea of the bendy straw slide.

Over time, Mrs. Bailey (Jennifer Garner) starts to get sick and is sent away for recovery. June starts alienating from Wonderland. She realizes that she cannot bring herself to whisper in Peanut's ear and burns the blueprints of the park out of frustration. Sometime later, Mr. Bailey sends June to math camp. June is worried that her father will not be able to take care of himself in her absence as she does most of the work around the house.

After misinterpreting a note from her father (Matthew Brodrick) as a cry for help (it simply said "miss you"), she uses her friend Banky (Oev Michael Urbas) to create a distraction on the bus to escape and return home. On her way through the woods, she encounters a floating piece of her Wonderland Blueprint and follows it. In the process, she finds a broken-down Wonderland in the woods.

The park is currently being stormed by a cloud named the Darkness. June meets the animals who are fighting the Chimpanzombies, who are destroying the park and feeding it to the Darkness one piece at a time. Boomer says that the Darkness appeared when Clockwork Swing stopped working one day all of a sudden. It was the evil from the Darkness that converted the plush toys into Chimpanzombies. Peanut tried to start Clockwork Swings, but he lost his magic and was attacked by the Chimpanzombies and taken away.

More than half the park is already gone, and the animals are worried about their future when the remaining half also goes. June convinces the animals that Wonderland is a figment of her and her mother's imagination that became real. She knew everything about all the animals, including their most personal habits. June promises Greta that there is a real shot of fixing Wonderland and that she is not giving them any false hopes. June and the animals attempt to fix the park's mechanism but are attacked by Chimpanzombies, the park's former plush toys. In the chaos, June gets separated from the animals and finds herself in a floating chamber known as Zero-G Land.

There, June finds Peanut hiding from the Darkness and confesses he felt lost after he stopped hearing the voice in his head, this leads June to realize that the Darkness was created by herself as a result of her cynicism from her mom's illness, the Chimpanzombies break in and take Peanut as their prisoner, but June manages to escape.

June runs back to the animals to tell them she found Peanut, but also confesses that she is responsible for the Darkness. Feeling upset over this revelation; they abandon her. After noticing the piece of the blueprint and realizing that she has been able to create the ideas for the park herself, June manages to fix one of the attractions to catch up with the animals and make it to the park's mechanics.

The gang finds the Chimpanzombies taking Peanut to get sucked up into the Darkness. The animals fight back while June rushes to save Peanut by jumping into the void. She reveals to him that she provided the voice for his imagination and that he should not let the Darkness take over him, giving him an idea to make a slide to out of bendy straws escape.

While the gang and Peanut are riding the slide to avoid the Chimpanzombies, June then notices that Clockwork Swings is attached to her name written in cursive, just like the blueprint piece. With Peanut's help, they get Clockwork Swings back up and running by using her name to move the gears, and clear up Wonderland from the Darkness. A cloud remains over the park, to which June interprets as a reminder to continue to be imaginative.

June returns home, and with it, her now cured mother, and they set up a Wonderland in their backyard. June then shares with other kids the story of Wonderland.