KidLogger is an open source software for parental control and PC monitoring. The program isn't hidden and you can control the access to user interface with a password.
It will record all keystrokes and clipboard content, URLs of websites, will record an audio file when microphone is used and will make screenshots at desired interval or when webcam is used.
Is also able to make a screenshot of current window when the user is typing certain words.
Reports can be sent through email or in an online account (paid upgrades).
Is a basic and very easy to use tool to monitor children.