You have to be 16 and have a driver's license. We were at the Poly in August and in the past my kids have always rented the water mice, but this time my son, who turned 16 the day we left (I know I know bad timing, but what can you do!) could not go out alone. He went with my daughter, but they both said it wasn't the same. He could not drive it, he had to be a passenger. They only rented them one time and usually they rent them 4 or 5 times. I think this new policy is a good one. There has been far too many accidents.