In Ruby, value objects are objects that represent a value and are immutable. Creating value objects in an idiomatic way involves understanding several principles of Ruby's object-oriented features. Key aspects include using the Struct class for simple structures, employing the `attr_reader` for attributes, and overriding equality methods (`==`, `eql?`, and `hash`) to ensure that the value objects can be compared correctly based on their content rather than their identity. Additionally, leveraging Ruby's `freeze` method can enhance immutability, ensuring that once created, value objects can't be altered. This approach promotes cleaner code and helps in maintaining a clear model of data that behaves as expected. As Ruby developers continue to share best practices, there is a trend towards embracing immutability and encapsulating data management within value objects, fostering better code maintainability and readability.