Como son tus padres
"Como estan tus padres" means "how are your parents" in English.
"¿Cómo están tus padres?" translates to "How are your parents?"
"They are your parents."
how are the girls -- How are they (all boys or a mixture of girls and boys)?
Those of your parents are your grandparents.
What are your cousins like? literally, "how are your cousins."
De donde son tus padres?
Tus ojos brillan como el sol. "You eyes shine like the sun." Or "Tus ojos son como la luz del sol."
"¿Qué cosas hacen tus padres?" translates to "What things do your parents do?"
Tus ojos y cara son hermosas.
Tus ojos son tan bellos como el sol.
Oh, dude, that's easy! You just say "Mis padres son de (insert country)" which means "My parents are from (insert country)." It's like asking where your folks hail from, but in Spanish. So, just drop that line and watch the conversation flow... or not.