silly redstone ideas [bedrock edition]

I am trying minecraft redstone as I am sick and bored.

so, to cure my boredom, I need ideas.
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It needs to be in bedrock

first off 1.21 idea: use the crafter, make it craft diamonds into diamond blocks, but then make it craft them back into diamonds

make a useless machine (one of the ones where you flick a lever and then it destroys the lever and resets itself)

build a tnt cannon or a camera

Make a recreation of a Mario Kart track

or an ATM

[yt][/yt]