|“||So this is the equation playground?||”|
The Equation Playground is a fictional place where Algebraliens are living and playing in. It appeared in "X Finds Out His Value", as well as "The Number Playground Chronicle!", "Thanks for 700,000 subscribers!", "Lo-Fi Beats to Yoyle To", "Thanks for 800,000 subscribers!", "Thanks for 900,000 subscribers!", and "Thanks for 1,000,000 subscribers!".
- According to "X Finds Out His Value", there is at least one tree, one bench, and several equation see-saws there.
- Additionally, in "Thanks for 700,000 subscribers!", it is shown that there is also at least one swingset with omegas for bases and a minesweeper.
- As shown in "Thanks for 700,000 subscribers!", it is located on the same "Math-Earth" as Elsewhere.
- A map of the Equation Playground can be seen in the The Number Playground Chronicle!.