We use Discovery Education/ Espresso Coding as our scheme for coding in school. Most of the children know the login details but they are USER: student19064 and PASSWORD: dragon. Please carry out some of these activities with your child (they are both fun and very educational) and feel free to use the free code/challenge tabs too.
I would like to also guide you to the following fantastic website that we use regularly in school, Code.org. Click on the 'Hour of code' tab once you log in. This is a free site that does not require signing up.