Our kids are two, five, and ten. There is very little that entertains all three of them. We’ve tried biking. The oldest does okay, but the younger two are basically ballast, adding seventy pounds to the bicycle trailer of whichever parent happens to be healthiest at the moment we set out. We’ve tried skiing. My husband and I hit the slopes with the oldest kiddo while the little ones run up a tab in the childcare room, and trade colds and flu bugs with the other inmates.