I found this overview on the microblocks site linked by the parent comment: https://wiki.microblocks.fun/en/boards/supported https://wiki.microblocks.fun/en/boa

I found this overview on the microblocks site linked by the parent comment: https://wiki.microblocks.fun/en/boards/supported https://wiki.microblocks.fun/en/boards/supported. The list includes the micro:bit, which I can recommend from experience, but the rest also look like good choices.