>> public class Crabmenu extends Actor The class identifier; the bracket that follows and its matching pair enclose the fields and methods for the class { >> public void act() A method identifier: the bracket that follows and its matching pair enclose the fields and instructions The 'public' means that it can be called from the world or another actor class as well as from its own class. The 'void' means that no information will be returned when exiting the method. All 'act' methods for all objects in the world, and the world, are called in rotation, continuously. Each set of calls is called a frame. { >> if (Greenfoot.mouseClicked(this)) The conditional statement above checks to see if the object that triggered executing the act method was clicked on by the mouse. If so, the statements in the following block (between the brackets) will execute. { >> new Sandbg(); The statement is really meaningless. It creates a new Sandbg object, but does nothing with it. That is, it is not being held in a field and it is not being added to the world. It is basically lost as nothing else happens in this method. } } }

Thank you for the help - but how do I add it to the world?