Przez postrzeganie swiata i słuchanie sa w stani

we should do a test-play of those games with our friends.
dobrze to jest?
Powinniśmy zrobić testowe gry z naszymi znajomymi

Moreover, we can ask children about the reason of their trip, destination, or about items which they are taking with them etc.
CZY UTWORZONE ZDANIE JEST POPRAWNE GRAMATYCZNIE?

'etc'.
W jaki sposob mozesz zapytac dzieci o 'etc'?
Moreover, we can ask children about the reason 'of' FOR their trip, (tu cos brakuje) destination, or about items which they are taking with them 'etc' (nie rozumiem co ta 'etc' robi na koncu zdania.)
Czy w powaznych tekstach kiedys widzialas 'etc'?.