My son learnt how to do letters, numbers, tell time and practice colouring, all on an iPad using free games.
My children learnt all of that either with us using pencil and paper, or at nursery.
That aside, they do get occasional tablet time. Cbeebies app is pretty good for a variety of ‘educational’ games, and is fully locked down.
Tablets for kids aren’t a bad thing per as, it’s just that some people seem to use them as a panacea like babysitter. Give child tablet, ignore child.
Engage with them when they’re playing/learning. Again, the Cbeebies app is good for that. Loved the Nina and the Neurons game with Little Miss CFH. The Boy adores the drawing game on it. Both of them love Andy’s Dinosaur Adventures and the Octonauts games. We join in the play.