They used to love playing it the normal way, but since they found out about creative mode they just use that all the time so they dont have to eat, drink, farm materials, and they can fast track them selves to bosses. Basically they like the game, but dont because there is a way to turn off the challege, that is what they do. My sister really hates that they play the game like this, which is the only reason I am asking in case there was a way but I didnt know about it.
I have told her if she doesnt want her kids to spend all thier time on Ark using creative mode one thing she can do is remove it from thier computers (her kids are still young enough for her to want to control it).