I don't know if it's still worthwhile to do so since so many games have things to prevent your from cheating, but I personally would love to learn to create a script for neopet.
I know the language used for tampermonkey is javascripts, but I don't even know where to start -- even if it's something as simple as creating a script to bet on turdle racing or spinning the wheels, those would be a simple start and would help QOL wise when you have the round and round boon.