https://www.codeforlife.education/rapidrouter/. A huge range of coding opportunities including Python coding
https://lightbot.com/flash.html A favourite in year 3 and 4 especially
https://code.org/ A range of coding including Minecraft and angry birds
https://www.kodugamelab.com/. Create a virtual world with coding
https://scratch.mit.edu/projects/editor/?tutorial=getStarted. Aimed more at year 5 and 6 to create games and more- follow the tutorials
https://www.codecampworld.com/?utm_source=UK+Schools&utm_campaign=3f9c2f216c-free-resources-uk-schools&utm_medium=email&utm_term=0_72db977414-3f9c2f216c-253621473. They are offering a free trial for parents to sign up with lessons and a huge world of activities.
https://education.minecraft.net/class-resources/coding-with-minecraft/. Minecraft offers a wide range of educational activities.