My fav kids game of all time is pajama sam. I forget which one but there is a fully compatible pajama sam game.

Also side note: (coming from a Dyslexic person) the steam deck could help reading!!! When i was a kid, i really wanted to play jrpg and pokemon games. My parents would only get me a new jrpg game if i told them what happened in the game to prove i read it. Just some food for thought.