Build something that the kids love, and that is enticing to their parents, and eventually they drag granny and grandpa into it kicking and screaming, and then w

Build something that the kids love, and that is enticing to their parents, and eventually they drag granny and grandpa into it kicking and screaming, and then we have everyone on a new platform. And then the kids get bored and leave, and the parents start to dwindle, and you're left with granny and grandpa and their all-caps rants until they get dragged off to the next platform.