My wife has been transfered to Zurich and I will be following her. We have 2 Sons aged 2.5 and 1 year old.
My parents have been living with us and taking care of them here in Singapore. We hope to bring them along with us to Zurich.
Has anyone faced a situation like this? Is there a way to get a visa for them, if yes what kind of Visa?
I forgot to add

:
Me = Singaporean
Wife = Danish (main applicant)
Kids = Danish born in Singapore
Grand Parents = Indians + Singapore Permenant Residents
Thank you and looking forward to your responses.