How to obtain rainbow chips?

How to obtain rainbow chips? - Man in Black Sweater Sitting Beside Woman in Brown Long Sleeve Shirt

In Cookie Clicker Collector, you go to the settings button and see this: enter image description here

How do I get rainbow chips in the first place? What can they be used for?

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How to obtain rainbow chips? - Person Holding Green and Red Coloring Pencils

How to obtain rainbow chips? - Rainbow Over a Brown Hill

How to obtain rainbow chips? - Colorful Paper Folds

रंग बदलना गोटी, जादू सीखें, Rainbow chips magic tricks, #magictutorial

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Ivan Samkov, Cup of Couple, Ximena Alvarez, Katie Rainbow 🏳️‍🌈