New UK Citizen by decent wants to move to UK and bring child

[juju727]

Hello,
I recently became a British Citizen by Decent and I'm planning a move to the UK. I live in the US. I would like to bring my son (14), unmarried 21 year old daughter (currently a college student in U.S.), and her son (aged 18 months). Can anyone help me with which Visas I could apply for for them? Well, at least my son. I understand that my daughter is an adult and may have to do things on her own but I'm not sure.
Thank you so much

[Obie]

You daughter and grandson will have difficulty to enter the UK.

For the 14 years old son , it may not be so hard.

Where is the mother, and have you got sole responsibility of him or will mother be coming also?

[juju727]

Thank you for the reply, Obie. I am the mother (I should have mentioned that). So I guess what would I need to do for my 14 year old son? I have sole responsibility.
Again, thank you.