Short interview lesson in KS1, need some help please!

[TeacherKS1]

I've just got an interview for a KS1 role. The brief says I need to tell a story suitable for KS1 in 15 mins or less and need to show my creative side.
I'm thinking I need props but my head is spinning. They've mentioned the IWB will be available but how do I use this with no time to set up?
Anyone ever done this? What would you think they were looking for?

What about something really familiar (a traditional tale like the 3 little pigs perhaps) that has lots of repetitive bits that you can do big movements to? A sort of group drama thing. Or call and response?

Thanks Asleep. I thought about traditional tales but I'm a bit concerned about drama type stuff in case they are very quiet, I don't want to rely on their input. The head (and possibly assistant head) will be observing so I'm not sure how subdued the children will be.
Going to find out which topics they're doing at the moment and maybe link it in if I can.