Yep, that's what happens when the kids make the height requirements, it's like "a whole new world."
If he likes coasters that much, take him to Cedar Point and Six Flags Great Adventure. There's nothing like getting off Top Thrill Dragster, looking around, and knowing there's about 10 more great coasters to ride. You've also got Michigan's adventure you can visit if you haven't already. CP will have Maverick opening some time in June. It was supposed to open this weekend, but they need to fix a section of track just after the launch.