I don't know if you figured it out yet but it doesn't auto connect the first time, you have to manually setup via blue tooth settings and then it should stay connected whenever you turn both devices on.
It uses Bluetooth to communicate. First make sure the keyboard is charged and on. There is a Bluetooth pair button on the right hand side of the keyboard next to the power switch, then go to your iPad Bluetooth settings to pair. Hope this helps.
i walked into the store and one of the guys told me that the size of the three generations of mini are the same , and it should fit it. Otherwise you could always take your mini 3 and try. I hope this helps
It is pretty secure in the case with the ipad clicking into the corners and a bottom bar that is magnetic and helps the ipad stand in position. But I wouldn't recommend it for kids who are going to drop the case and ipad. I would personally want a stronger case for kids.
No but there are other keyboards for the Mini 4 at Best Buy. I believe the mini 4 is a slightly different size so the case wouldn't fit for the mini 4.
Products from my answer
Logitech - Logi FOCUS Keyboard Folio Case for Apple® iPad® mini 4 - Black