Sphere Simulator is a gadget from Doraemon: MPH (0202)
Function[]
It allows you to think what kind of place you want to create, creating a replica of the real place inside the sphere. However, to get inside the gadget, you must use a Gulliver Tunnel or Small Light to shrink yourself.
Trivia[]
This fanmade gadget is really similar to the real gadget from the movie: Doraemon: Nobita's New Dinosaur (2020 Movie)