Formal:
* Children: This is the most formal and general term.
* Youngsters: This is slightly less formal and implies a group of young people.
* Minors: This term is used legally to refer to people under a certain age (usually 18).
Informal:
* Little ones: This is a cute and affectionate term.
* Small fry: This is a playful term, often used to refer to children in a group.
* Brats: This is a derogatory term, used to refer to children who are behaving badly.
* Sprout(s): This is a humorous term, often used to refer to children in a playful way.
* Offspring: This is a formal term used to refer to children, especially when talking about animals.
Other options:
* Youth: This term is more commonly used to refer to teenagers or young adults.
* Boys and girls: This is a traditional way of referring to children.
* The younger generation: This is a more general term that refers to people who are younger than the speaker.
The best equivalent for "kids" will depend on the specific context. For example, if you are talking to a group of parents, you might use the term "children." If you are writing a blog post about parenting, you might use the term "little ones."