Blockly is a bit like Scratch- Can you complete the challenges. Suitable from Y2 onwards.
Improve your coding skills. Create a free account in Scratch- then click create for some great tutorials. Have a go and see what you can make!
Code Monster- http://www.crunchzilla.com/code-monster
Start to learn java script with Code monster.
Hour of code- https://code.org/learn
The many hour of code activities are one hour activities designed for all ages. Many use the scratch or minecraft platforms that most pupils at KS2 are familair with.
Bandrunner- play the game answering e-safety questions as you go.
BT Internet Legends https://beinternetlegends.withgoogle.com/en_uk/interland
Interland game - Explore the Kind Kingdom, Reality River, Mindful Mountain and the Tower of Treasure on this mission to become an internet legend.