Nick Cannon is having some summer fun with his 11-year-old twins! The 41-year-old rented out an entire waterpark for his kids Monroe and Morocco, whom he shares with ex-wife Mariah Carey. “Whole waterpark just to ourselves. It’s the rock and roe takeover,” he said in a video posted to Instagram. On Sunday, he shared the thrilling moment they went down a massive waterslide and the pair screamed and cheered while getting soaked.