Ken tapped his pencil as he wondered what to change next. He wanted to do something insane, like change the entire human race. The question was how did he want to change them. 'This is tough... I could do anything. But what do I want to do?' Ken wondered as he tapped his pencil again before smirking. "Got it." Ken said as he turned the notebook pages to the one describing the human race.
Erasing most of the details of the human race Ken began to write what was going to take it's place. "Humans are genetically similar to cats, enough that breeding with most cats is possible. Beastality is accepted among humans, as is nudity. Humans have a pair of cat ears on their head in place of their former human ears. Humans have cat paws instead of feet and are flexible like cats. Humans have long tails similar to cats that acts depending on mood in not controlled. Humans have three rows of teats that grow into breasts on females. Humans have claws in place of fingernails on their fingers. The human bone structure allows walking in either a bipedal or quadrupedal stance comfortably, with a slight preference to quadrupedal. Pads on the palms of their hands allow for walking easily while quadrupedal.
Humans are a tribal race that hunts in packs. Male humans are typically solitary and live alone, while females live in packs and raise the young until they are old enough to live on their own. Humans have excellent eyesight that allows them to see at night with their catlike slit eyes. The preferred method of hunting among all humans is tooth and claw." Ken finished writing as he smiled before making one last change to his own page. "I am a six year old, female human cub." he wrote as the world started to shift around him.
The notebook disappeared as Ken started to shrink, his hip snapping as they ballooned out slightly in a feminine shape. His clothes disappeared as his fingernails disappeared as well. Grabbing down and reaching for his dick he felt it slowly receded into him as his ears migrated up his ear and start to change into cat ears. A long tail shot out from his behind as his feet changed into furry paws, his nipples hardening as four more popped into existence on his chest, just his his dick and balls finished receding and a small hole, his new vagina opened in it's place.
With that final change the rest of her body slimed down to girly proportions as Ken fell to all four, mewing in shock as she stretched and the world changed around her.
The walls of her room faded into the walls of a cave as other human cubs lay around her, curled up sleeping as Ken's eyes started to droop. just as she fell asleep her mother walked in with Jessica and slowly picked up the sleeping cub, cradling her as Jessica smiled and rubbed her little sister's furry ears. Old time would tell how things would turn out now.