Ask HN: Best macOS Apps for (9 YO) kids

My 9yo needed a laptop for school so we sucked it up and bought him a MacBook Air (M1). I've installed a couple of apps (Epistory for typing, Rocksmith for jamming on the guitar) but am looking for the best educational apps that money or free can buy. Gamification is good, but not strictly necessary. Can any other HN parents provide suggestions? Would greatly appreciate it!