One well-known aspect of oracy is public speaking, or ‘presentational talk’. You can find some children’s speeches to inspire you, and the students you work with, here:
https://www.kiddy123.com/article/10-inspiring-ted-talks-for-kids-to-watch.html
Speak up, Speak out
For some UK-based examples: videos from the brilliant Excelsior ‘Speak Up, Speak Out’ speech competition in 2023 are available here (scroll down to find them).
Enjoy!
More about public speaking
Recommended reading for teachers and everyone else too!
Six things you can do to help pupils gain the skills and confidence to speak to a room full of people