A kaleidoscope was a toy consisting of a tube filled with multicolored pieces of glass. By looking through the viewing slot, the user would see an optical illusion that looked like spinning jewels. Romar Adell, a Serennian, saved a kaleidoscope from Serenno City sometime before 19 BBY. He had been living there after the Galactic Empire destroyed the city. He then brought it to his home in the upper forest region of the planet, near Castle Serenno.
When the Bad Batch, a group of genetically defective clones operating outside regulations, found themselves stranded in the Forest Region after their attempt to seize a portion of Count Dooku's war chest failed against the Imperial unit guarding it, Echo compelled Romar to offer them shelter. While there, he presented Omega with the kaleidoscope, explaining its function to her, as she mistakenly believed it contained actual jewels from Dooku's treasure. Romar explained that the toy was designed to bring happiness, which he considered more valuable than any treasure. Inspired by Romar's words, Omega went back to the crash site of one of the containers holding the chest and tried to retrieve it, with Echo and Romar chasing after her. After a brief battle with the stormtrooper clones protecting the container, the Bad Batch made their escape on their Marauder Omicron-class shuttle. Before they left, Romar gifted the kaleidoscope to Omega, urging her to always remember what he had told her.