The children are introducing themselves

do you know the wilsons? they*re a very friendly family.

определенный артикль the ставится перед именами собственными (фамилиями), обозначающими целиком всю семью. 

i want to be a superstar

you should like this kind of movie

i would rather do homework now, than tomorrow

it would be better, if it doesn't rain today

i prefer strawberry icecream rather then chocolate icecream

i don't mind, if you come over now

i wish i had a car

i'm quite willing to help you