Sorami just nodded. Again, she understood Joshua's skepticism, so she figured she would show them proof. "Alright, that's fair enough. I have no intentions of forcing you to do anything you wouldn't want to do, so even if you do come to believe me, I will understand if you don't want to go on this mission". With that, Sorami stepped forward into the house, since she didn't want anyone seeing what had to be done. She had no ill intentions, her voice and eyes displaying her absolute sincerity. 

"Alright, shall we go then?" She raised her hand upward, pointing her fingers towards the sky. In one moment herself, Joshua, and Amaya were all  encompassed in beams of white light and in the next the three of them were no longer in the house. Instead they were inside of a new structure, the glass dome around them giving them a view of the empty void of space around them, the ship they were in facing their world, so Amaya and Joshua were able to see their world from space. 

The three of them were indeed in what could appear to be the [url=http://ps2media.ign.com/ps2/image/article/678/678511/kingdom-hearts-ii-playtest-20060103044510696.jpg]helm of a ship[/url] (assuming they don't know what a cockpit is if they don't have any ships that have them), a highly technological one. There were three seats, Sorami in the front one that gave her access to the controls, the captain's chair, while Amaya and Joshua were in the back two seats. 

"Welcome to my ship, the Highwind. It belonged to my ancestor Sora, who was a Keyblader like yourselves". She typed a few things on a keyboard, the image of a large, white castle appearing on one section of the glass, as if it was also a monitor when it wasn't giving them a view of the path ahead. "I shall take you to this world, or more accurately the castle where the ruler of said world resides known as Disney Castle, its ruler being his majesty King Mickey, who is the one who wrote that letter". 

Of course, before she left, she decided to ask one more question, giving a grin back towards Joshua. "So, do you believe me yet, or do I need to actually take you there as proof?" She figured it would save time if he just believed her already so that they could go say their appropriate goodbyes or refuse the mission, but otherwise she wasn't against taking them there and then taking them back. After all, she was pretty confident that any technology that was present in their world couldn't do this.