Nate opened the door and called his sister, "Hey, Shorty! Come up here please."
A few minutes later a girl about ten came in wearing a skirt and a t-shirt. "What's up Nate?"
"We're just playing on my computer."
"Oh, what did you want me for?" She asked.
"Well my computer is magical and wear wondering if there was anything you ever wished you could be?"
"Yeah, whatever Nate!" She said, "If it is so magically make my clothes in sexy skirt so I look older."
"Sure," Nate said, clicking on his sister's icon that appeared when she entered the room. An option came up for clothing, which they looked over. When it popped up the options came up; casual wear, sexy clothes, toddler attire, and baby attire.
Being the boy they were, they wanted to play a prank. They decided instead of being 'sexy' she would be 'baby', and they clicked the baby attire option.
They watched Nate's sister as her clothes changed. First to change was her panties which changed into a diaper, which the could now see sticking out below the skirt. Then they saw her hair pull into pigtails. Next the skirt and t-shirt formed together, and created a floral sun dress. Then her flip-flops changed into Mary Jane shoes.
Then...