Just as the title says. What age did you get your child their own device, and what did you get? Do you limit usage?

I "gave" D my old cell phone around probably 3 years old. It has wi-fi only and I've downloaded a few select games. I keep it in the diaper bag and he only gets to use it when we're out and he needs a distraction - like sitting in my OB appointment while I'm getting a pelvic exam.