I know it's bad to give a kid a tablet, but the scoring used in the article is that bad it didn't award any points for how good it is for a child...
My child has had an old iPhone se since 4yo. It has no network connection. I load music on it. It only has music, camera, and voice recorder apps. Like most toys it gets intense periods of play and then goes back in the toy box with a dead battery for weeks.
It's my assertion that the problem with tablets/phones as toys for kids is the endless stream of new content. It's addictive and never gets old. If you find a way to cut off the firehouse of new (and keep the addictive apps off) then they eventually become just another boring toy. Us adults could learn from this too.