Scratch for Arduino
We spoke to John Maloney about Scratch awhile back (part 1 here, part 2 here) - now Scratch is available for the Arduino, courtesy of the Citilab folks:
S4A is a Scratch modification that supports simple programming of the Arduino open source hardware platform. It provides new blocks for managing sensors and actuators connected to Arduino. There is also a sensor report board similar to the PicoBoard.