Disclaiming Banner: I hear-by declare for the benefit of all sentient beings that I have no right or claim to ownership of ATLA as an intellectual property. But I can still dream.
Soap
A hundred years of war had shown what Earth was about. Earth was about stability. It was about the planet deciding to Stay Here until something extraordinary came along and forced light, or movement, or puppy-rabbits into it. And when that force started the avalanche, it didn't stop until Earth felt like It.
Of course, Toph was the avalanche. At two (maybe two, or three, those memories were all fuzzy) the servants hadn't bothered to keep her pristine clean. She'd been an adventurous, messy baby and they just expected her to get dirty. Many a happy, happy day had passed roving in the gardens figuring out what the world felt like. Five was so different, it was like torture. Five saw her Earthbending training crawl by at such a slow pace that she began to wonder if Master Jerk ever wanted her to play in the dirt again. Maybe the laundry staff had bribed him...
She met the badger-moles when she was seven, though, and it was like being born again. But waaaaaay more exciting this time around. Ten, meant that she was the Blind Bandit finally. She got to say things in the ring that would get her mouth washed out with soap at home.
And the whole world knew she was Awesome by twelve.
Now that she was fifteen, she wanted to scrub out her own brain. For the first time in her life she wanted soap. Naturally, it was her parents fault. They had set aside their dislike for each other one more time and managed to produce another kid. And brain-bleach aside, it was Toph's new mission in life to make sure it grew up in the mud. Fortunately, she was still the avalanche.