Here is a list of websites that could support a discussion about internet safety:
This website is really good, it has videos and games to talk about the dangers of the internet. It can be done by the child on their own and then the child and adult together
This website has some good talking points
This website has some good top tips to go through with your child and you can also create a cool avatar.
This website has some good discussion points that you can talk through with your child and come up with a home agreement.