I would consider something like the BBC MicroBit[0] or Calliope Mini[1]. Similar to an Arduino but much more accessible for first time coders. And, as many have

I would consider something like the BBC MicroBit[0] or Calliope Mini[1]. Similar to an Arduino but much more accessible for first time coders. And, as many have mentioned, the Raspberry Pi series. 0. https://microbit.org/ https://microbit.org/ 1. https://calliope.cc/en https://calliope.cc/en