[squarefoot]

This seems a nice and open platform to experiment with; strictly speaking not what you are looking for but can be tailored to the task: https://wiki.odroid.com/odroid_go/odroid_go To me it also looks like a great gift for tech oriented kids.

Many Espressif MCU boards come with Lua already installed, and some other boards are supported by eLua. https://github.com/whitecatboard/Lua-RTOS-ESP32 http://www.eluaproject.net/