There are strict regulations on what types of wheeled items are allowed in Disney Parks. Electronic Conveyance Vehicles, commonly called scooters, are allowed, but the type of scooters that kids ride are not. The same is true of a ban on hoverboards, don't bring them on your vacation. Your kids might be pros at riding a skateboard at home, but a busy theme park is a different environment. A good rule of thumb is that if the wheels are for fun, they are not allowed. It's a safety issue. If your kid has Heelys and no other shoes, you might want to take the wheels out. Otherwise, instruct your child to not use the wheels. You don't want your child to be embarrassed by being reprimanded. Better yet, leave the Heelys at home as well. While wagons are items that are not necessarily considered fun, especially in a theme park setting, they are still not allowed. Once again, it is for your safety, the safety of your family, and also for the safety of other guests.