It doesn’t sound like much, but I foraged a bunch of willow branches a week ago and put them into a jar of water.
They root extremely well and you can create new trees just by snapping off a few branches and placing them in a wet environment.

I will use them as a living climbing help for my plants as well as living decoration, since you can bend them to your liking and then they will grow together to form knots in the connections.
You can also make a living fence or something else entirely.

I will post a few pictures soon with more information :)