Children become incredibly excited by drones and a good way to put their coding into a practical context is to code a drone. There are also good opportunities fro developing scientific and mathematical understanding.
There is a class set of drones available for you to borrow. This is now at Ashfield Park Primary School, Ross-on-Wye. You can contact them to request this here. Please note that you will need to collect and return them from / to the school.
Parrot Minidrones are the best place to start. You should be able to find them at £50 or less and there are a few apps that allow you to program them.
Best of all, perhaps, is Tynker.
Here are some resources that will help in the classroom:
Risk Assessment: Drone KS2 Risk Assessment (Word) Drone KS2 Risk Assessment (PDF)
PowerPoint presentation to introduce drones to your class: Drones Intro LOW QUALITY
Focused activities (mainly adapted from Parrot Education):
Cargo Drone Obstacle course
Jumping Drone Obstacle course
Power Mass Lifter
Time+ Distance activity Tickle+Tynker