You really don't want to go to school again, that sounds really boring. Luckily, you have a book that can magically alter your reality, and so you won't be having any of that. You can just change yourself into something else to get out of school, and then you can change yourself back when school hours are over and enjoy your childhood a bit.
So, you quickly write down into the notebook.
'I will transform into the family pet cat.'
You had always wanted a cat, and you were about to take this wish one step closer by becoming one. In a moment, you dropped the notebook and your pen as your hands slowly transformed into paws. Fur spread up over your new forepaws, up your arms, and onto your back. The fur over your paws were white, but once it reached your forearms it became a coat of black. When it reached your main body, black fur grew along your back and sides, while white fur covered your chest and stomach. The fur reached up over your head as your face pushed out into a muzzle, with whiskers sprouting from the end, and your ears moved up the side of your head, becoming pointed proper cat ears. As the fur moved down your body, reaching your legs, you felt yourself fall onto all fours, and a long sleek tail, ending with a white furred tip. The fur reached down, covering your feet with white fur, as your feet transformed entirely into paws. Lastly, your body decreased in size drastically, until you were no bigger than your average kitten.
And of course you were a kitten, because you were a child as a human! And so now a kitten as a cat.
And so you realize a problem now.
Your little kitten paws have no way of properly handling a pen to write, and the notebook itself is bigger than you now. On the bright side, you don't have to go to school, but you can't do anything with the notebook or to get out of this form.
"Oh hey, what are you doing?" Your mother had come into the basement again. Of course, she wasn't really your mother anymore, now she was your mother. She bent down and picked you up, holding you against her bare chest while she scratched you behind the ears. Of course, in the form of a cat, the nudity meant even less than it had as a human. However, the ear scritch is very pleasant. Maybe this form wouldn't be to bad to be stuck in.
"So, who's a good kitty?" She asked warmly, before proceeding to turn back to the stairs, stopping as she noticed the notebook on the floor. "Oh, what is this?"