When the child tries to access a locked item or an error occurs, a child friendly message box will displayed. You are able to get detailed information by clicking the 'Details' button.
Some message boxes require you to enter a password when you try to gain access to parts of the program that are locked. These include:
Quitting the program
Changing the settings
Adding more pictures to the program
In this case, enter the parental password and press 'OK'. If it is wrong, the only thing you can do is to press 'Never mind'... so never forget your password!