This is a cool little function that I found could be useful for parents!!!
1. Open Help and Support and type "logon hours" (without the quotes) in the search box.
2. Go to Full text matches and click on "Net user". See the examples for setting a user's logon hours. Some examples would be:
net user johnsw /time:M-F,08:00-17:00
net user johnsw /time:M-F,8am-5pm
net user marysl /time:M,4am-5pm;T,1pm-3pm;W-F,8:00-17:00
net user johnsw /time:all (this one means this user can always log on)
3. Open a Command Prompt window.
4. Enter the appropriate "net user" command for the user(s) you wish to restrict access for.