For what it’s worth, you will most likely see a game entered by a 10-year old in ParserComp.
I’m not sure if you’ve checked out the games in the Text Adventure Literacy Jam, but the aim was to create a text adventure suitable for children with no prior experience. I haven’t played all the games yet, but I did test five of them. The top rating games are fantastic. Check them out at Submissions to Text Adventure Literacy Jam - itch.io