Download Child Control 2012
Child Control 2012 this is a software for parental control. It keeps your children safe of websites they are not suppose to see and your computer safe of malicious programs, hacker attacks and files that connect to your system without you and your children noticing. It'll automatically shut down the system when the time you set for them to be in front of the computer its over. They won't be able to start the computer again.
You can easily configure Child Control 2012 and create several user accounts,depending on how many users want to control what kids see and the time they spend on line. They won't be able to shut down the software because it becomes invisible once you get it started and has passwords to deactivate.