There are a number of fantastic websites which can be used interactively by your child to improve their knowledge and understanding based around E-Safety. Please use the below links to help your child develop their knowledge of how to stay safe on the internet.
https://beinternetawesome.withgoogle.com/en_uk/interland
https://www.bbc.co.uk/bitesize/topics/zfcvhbk/articles/zkcj92p
https://school-learningzone.co.uk/key_stage_two/ks2_computing/ks2_e_safety_for_kids.html
https://nationalonlinesafety.com/