Thinkuknow website for ages 5-7 - look at this website with your child and read to them key information.
CBBC's Stay safe online page - it is likely your child is already looking on the CBBC website so show them this page to educate them about staying safe online.
Download Microsoft Silverlight - Click here to download Silverlight which enables you to set parental controls on your windows 7 PC. Other versions for older PC's are available.
Setting Parental controls on an Apple Mac - Here is a simplified explanation of how to set parental controls on an apple mac, using safari browser.
Child exploitation & Online Protection - National Crime Agency website dedicated to online security and child protection.