New Scratch for Raspberry Pi: now with added GPIO https://www.raspberrypi.org/blog/a-new-version-of-scratch-for-raspberry-pi-now-with-added-gpio/
The new version of Scratch for Raspberry Pi is faster, with built-in support for using the GPIO and camera module. Example project scripts are available.
I had been forced to use Lego Mindstorm NXT kits at a high school with very limited