The family computer has 3 users (mom, dad and daughter). All 3 use KDE. Daughter is too young to deal with passwords, so she is a member of the nopasswdlogin group so she can log in without a password. However, when daughter is logged in and dad wants to use the computer, dad goes to "Switch User" and logs in to his account. When daughter wants to play again, she goes to "Switch User" to log back in to her account. She is then faced with a "This session is locked" dialog and prompted for a password.
The same thing happens when daughter is logged in and the computer goes to sleep. Upon waking up, her session is locked and she is prompted for a password.
How can I configure daughter's KDE account so that she is not prompted for a password when either switching back to her account or when the computer wakes up?