How do I ban my son from looking at sights he shouldn't.
Is there a thing on the computer where u can type in word and it will save, so when he goes to view poo for example he can't as the computer is programmed not to allow him.

Can anyone help

You can try K9 web filtering software: K9 Web Protection - Free Internet Filtering and Parental Controls Software (http://www1.k9webprotection.com/)

Thank you I will give this a go ;)