I’ve got an Ozone Flow 4m. Maybe look at the 3m if kids will be using too.
Its a basic friendly 4 string kite. It will drag you reasonably easy and will teach you all about the wind window and how to fly them to get the most out of them.
The other one to look at is the Hq Beamer. I just thought the Ozone looked nicer ;)
Have a look at the Kite Crowd forum.
I don’t fly mine as much as I used to. But still great to take to the beach in the car.