In the design challenge, I made my own clarinet. Mine worked pretty well and it managed to play Hot Cross Buns almost the same as the real saxophone.
My clarinet almost failed because I made the two finger holes too close together. And the other one is supposed to be on the other side. I was lucky that is still worked really well.
Felt, for the decoration on the bottle at the top.
Plastic bottle, for the horn. (removable)
My saxophone mouthpiece.
Hot glue, to attach things.
(The one on the top is mine. )