You’ve still got energy after waterworld and illusion world, so hit up Funworld. Located inside Nagoya Citywalk, this is a child-friendly mini-amusement park (so much more fun than the child-unfriendly ones, where they knock the ice cream out of your kid’s hand and untie his shoes). There are indoor roller coasters and bumper cars (those two are separate rides, although how fun would it be if there were roller coaster bumper cars?). There are carousel swings and carnival games (like “Guess If Your Carney Has a GED!). Go. At the very least the lights will mesmerize the kids, and you’ll get a few minutes of peace while they’re dazed.