Bouncy sausage
Last weekend I took the four students in the photo on a surfing trip. January surfing in Norway might sound like a strange thing to do but I can assure you it's not strange at all, cold yes but strange no. Over the Christmas period the West coast of Norway was hit by storm Dagmar which caused a lot of trees to fall down and some unusual stuff to get washed up on the beach, including the inflated sausage thing in the photo. It was probably some sort of fender from a ship but now, as you'll see in the video, it's a bouncy castle.
Lots of interesting physics here. The two on the left (Oliver and Rafik) seem to have hit the right frequency and are bouncing nicely in phase but Nikola experiments with different frequencies and phase relationships.
This wasn't the only sausage of the weekend, we also ate three packets of chicken sausages which also presented some interesting physical problems including how to roll a sausage that has been bent to fit into the pan. Maybe I'll take that one up again later.