Hello Eula Grace!
Welcome to
planDisney! You are days away from a magical time in the Parks and I'm sure you are very excited!
According to Walt Disney World Property rules, suitcases with or without wheels larger than 24" long x 15" wide x 18" high (61 cm x 38 cm x 46 cm) are not allowed in the Parks. In addition, the Airwheel appears to be not just a suitcase but a type of electric scooter as well. The rules also state that wheeled mobility devices with less than 3 wheels or devices that can't stand up while stopped, unpowered, and/or unoccupied are not allowed. These devices can only be operated at a walking pace so they can't be very fast. The Airwheel specifications seem to show that when extended it exceeds the size limitations and that these devices are very fast.
If you need to use an ECV or wheelchair then know that you can rent acceptable ones at the Parks! They are just for use at the location where you rented them so when you leave the Park you will have to return them. If you visit another Park that same day you can show your receipt and get another one to use at that Park. If you want, you can also purchase a wheelchair rental for the length of your stay at a slightly discounted price. A length-of-stay rental is not available for ECVs. These devices are available on a first-come, first-served basis so make sure you secure them first after entering the Parks. In addition, if you do end up bringing that luggage, know that if allowed, it can be stored in the lockers located at each Park. There are some larger ones with enough space for them but know that they are very limited.
Eula Grace, I am worried that Security will not allow you into the Parks with your Airwheel and you will be stuck figuring out where to put it. I suggest leaving it at your Resort hotel so you don't have to worry about where to put it and lose precious Park time.
I hope that this helps and you have a lovely time!
Happy Planning!
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Nimmy