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This robot has no "brain" even though it has a Arduino processor. The brain for the bot is located in the PC and the program is S4A (Scratch for Arduino, version 1.5) based on Scratch, a MIT developed block programming language easy for early programmers (and even children) to learn. The "tail" of the bot is a permanent USB umbilical providing commands to the Arduino on the bot and all power to the bot, including all motor power. With a "light weight" USB cable it works out fairly well. Right now, ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/turtle-bot