The Calamity Box is a magical music box/chest, which is believed to play music. It is also unexpectedly used for interdenominational travel between the human world and Amphibia. It was held in a Thrift Stop.
The box is small. It's ornamented with gold and three different gems (purple, blue and green) which lost their color once Anne, Sasha, and Marcy got transported into Amphibia. It depicts a frog in the tropical woods, praising the gems. It also has a small key on its right side as an accessory.
It is a magical relic that supposedly can be used for dimensional travel between both the human world and Amphibia.
It is known that for some period of time it remained on Earth in an old thrift store.
Three months prior to the episode "Reunion", Marcy found the box in the thrift store as a mocking birthday present for the frog lover, referring to Anne, as she was having her 13th birthday. Marcy posted it via text messaging to her and Anne's friend Sasha, after she found out Anne was disgusted by frogs during a frog dissection at school. Anne was soon after forced by Sasha to go meet up with Marcy to check out the box, despite Anne's birthday party starting soon after Marcy sent the text, adding to the fact that her mom and dad were waiting for her at home. Nevertheless, she stole the box from the store and the three went to an old playground to open the box. Anne then opened the box in front of Sasha and Marcy, when suddenly light coming from inside the box flashed on the three girls. This event caused all three to be transported into Amphibia, but none of them landed in the same location from each other, leading Anne to believe she was the only one who was transported. The box remained in possession of Anne as she carried it around in her bag, though wrapped in a blanket. It also revealed that, after one use, it became inactive. It seems that because of its inactive status, it is the reason the three gems on top no longer have their color.
In the present at the end of Anne Vs Wild, Anne finally decides to reveal to the Plantar family how she got into Amphibia in the first place, which was with the small box she thought to be a music box. Anne asks them if they know anything about it, but her friend Hop Pop Plantar claims to have never seen anything like it. However, later that night as Hop Pop is researching in his study, he comes across a page of the box with a picture, resembling the one Anne showed him with danger signs around the page titled the Calamity Box.
During the events of "Bizarre Bazaar", Anne and Sprig decide to go to a secret market in the hopes of finding more information about Anne's music box. Eventually, they find a stand that has artifacts resembling the art on the box, but the box is soon stolen by a salesman before they can show it to the old lady running the stand. Luckily, Hop Pop had followed them to the market and is able to win the box back for Anne, but Anne decides to offer it to Hop Pop instead, believing she can wait a little longer if it means finding the right answers. However, to no one else's knowledge, Hop Pop decides to bury the box in a small patch of dirt next to the Plantar Farm due to his suspicion of it being too "dangerous".
- Calamity defines "an event causing great and often sudden damage or distress; a disaster," further implying the box is dangerous.
- A real-life version of the chest appears at the 2019 D23 Expo. It is presented by Matt Braly, who gives it to Kermit the Frog to look at while advising him not to open it. However, Kermit gets the urge to do so and, after giving in, ends up in Amphibia. He mistakenly calls it the "Magical Calamari Box" at one point and says the journey is "faster than taking the 5 freeway" due to less traffic.
- During the episode where Anne shows the Plantar family the box, the handle is missing, but in Bizarre Bazaar it reappears.
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