[NutmegCarrera]

Sounds like a good choice.
Was going to give advice about going with specialized. We have a bunch of them in our house.
My 11 year old has a 27.5” wheel MTB in a small frame and he does well.
Both kids had the 24” wheel MYB’s from specialized until this year. Bought both new, kept in great shape and got good money back by selling on Craig’s list. The market seems to appreciate good quality, and all in - you’ll pay 100-150 to ride a new bike for 2-3 years, depending on the kid and rate that they grow. Seems like a decent value to me. (That’s one tire for an air cooled car).

Some people like Trek, some like Giant, and there are lots of other good manufacturers. I’ve owned many Treks, and see a little more value in the mid range Specialized.

Important thing is to get the kids outside and spin those legs. Even better - go do it with them!