those children aren't somali. She should just call them black and white and leave it at that. Stop trying to fake a second 'culture' and confuse the children.
There are several half somali children in my extended family, I love them all the same but they're not somali.
They live/born outside of somalia, Don't speak somali, eat non somali food and will go on to marry a non somali. They are way more accepted where they live I don't see the point in trying to confuse children.
Often time the somali parent is barely in touch with their own culture as is.
The only half somali children that will be somewhat accepted are the ones that are other East Africans, and that live in somalia. Even then they will face discrimination.
I say let these kids be Norwegian.