"well, in the beginning, this seems a good purchase and my boy enjoyed, but it turns out this build only can be remotely controlled by a mobile device, which he is using an Apple iPad Mini 1 and this device only can go up to iOS 9.3.5. yet, this app requires iOS 10.3...
it took him about 4 hrs to finished the building process, and he even made few mistakes here and there, but as a 6 years old boy, I can't complain much.
in the end, when he finished up the wheels and few final pieces, he's very eager to add the new app to his iPad, but sadly, the message shows it's not working with his .....
I'm sure LEGO is capable to make this app compatible with earlier iOS, and I wish you do and can include iOS 9 in your next update. otherwise, there's another sad LEGO fan who can't play his newly build LEGO ....."