Another great chapter from the Parallax documentation for the Board of Education shield bot kit for Arduino! Chapter 3:
This chapter contains instructions for building and testing your BOE Shield-Bot. It’s especially important to complete the testing portion before moving on to the next chapter. By doing so, you can help avoid a number of common mistakes that could otherwise lead to mystifying BOE Shield-Bot behavior. Here is a summary of what you will do:
Build the BOE Shield-Bot.
Re-test the servos to make sure they are properly connected.
Connect and test a speaker that can let you know when the BOE Shield-Bot’s batteries are running low.
Use the Serial Monitor to control and test servo speed.