What is another way of saying somebody is a good example for children?
A positive influence or good role model.
he/she is a great role model for kids
Depending on the context within which you're using the sentence, you can say that the person is a great source of inspiration to children. You can also say that this person is a source of motivation, and the children look up to him or her.
fine person to emulate.
Don't swear. Good person. Nice to everyone. Nothing bad about them at all.