Upvote:6
The guidance for questions 4.19 and 4.20 is as follows:
4.19 Please list any of your children who will be travelling with you to the UK?
Please note that any children travelling with you may also need a visa.
If they need a visa, they will have to complete their own application form.4.20 Will any other children be travelling with you?
Answer Yes/No. This is any other children under 18 years of age, who are not your own children, but that will accompany you to the UK. Please note that if they need a visa, they will have to complete their own application form.
As you can see, this refers to children who are travelling with them from their point of origin to the UK. This doesn't describe your situation; instead, they are visiting you in the UK. They will explain this in detail in part 8 of the application, which asks who they are visiting and which family members live in the UK.
If they feel further explanation is required, they can write whatever they wish in the Additional Information section.
Finally, it is a very good advice to read the guidance while filling out the application. Following it carefully can help avoid errors or other mistakes that might cause the visa application to be refused.