TEARS OF THE KINGDOM ULTRA HAND CREATIONS

In the new Zelda you can construct a bunch of stuff with Ultra Hand.
And although I have not experimented too much since I've been busy exploring the world I have made a few memorable things.
I made a really terrible unicycle that controlled so badly I only just barely beat an NPC in a race across a canyon. The NPC wasnt trying to race me if your wondering. Anyway it was memorable.
I made a mobile spike barrier with a Shock Emitter attached to shock enemies.
and finally I flung a Korok to its destination with a simple slinging device using that auto balancing thing.
Eventually I want to make a home for link and a giant robot but haven't yet.
What have you made with Ultra Hand?