

I have a similar basket weave pattern that I like to use for baby or crib blankets.
I make slightly larger blocks and rely on stitch markers but as OP says it’s something one can knit without having to give it one’s full attention.
It’s also a nice clean pattern that doesn’t have the risk of catching on things. It also washes and wears well.
Most of the shows with ‘teenagers’ have casts in their late twenties or thirties.