"I would like to become a transformation booth," you say to the genie. "I'll be like a photo booth, except people will come inside me so that I can grant their wishes to turn into something else. I will spend my days in a modest suburban mall, and the only people who notice me will be people who secretly or maybe subconsciously would wish to transform, except for the employees who have to collect money that gets put in me. If the mall eventually shuts down, I will magically appear in another similar public place. If people want to transform into something that is too big to fit inside me, I will have the power to teleport them somewhere where they would fit. At night, when the mall is closed, I can transform into whatever I want and go wherever I want just by thinking about it. I will be electrically powered like any other coin-operated attraction, but I will magically never need to take up more power than the mall can provide."
"Wow, that's very specific, master. A very detailed wish. I guess it's time for me to grant it."
A snakelike worming feeling tunnels out from your belly button and you notice something long and black dangling out under your shirt and getting longer. You lift up your shirt and pick the thing up to look at it and see what it is. It's your power cable! You lick your lips realizing that this rubber-coated length of copper is basically how you eat and drink from now on: getting your magically sufficient energy from a wall socket like the magical machine you're becoming. You can feel more wiring start to snake its way around through different areas within you, including up into your brain which is to be converted into enchanted electronics. You can't wait to get into the mall and get yourself plugged in so you can start your new life.
You feel yourself starting to bloat up inside as a big pocket of air forms and pushes apart your insides like blowing up a balloon. From an external perspective, your getting much bigger, first as a sort of dome and then gradually more rectangular. Your legs and feet get sucked into your body and your head basically fuses with the closet-sized flesh chamber you've become. Your basically a giant torso with a face sitting on the ground with a thick power cord dangling on the ground. When you've mostly settled into a box shape, your mouth and anus start to open wide, getting wider as time goes on. When that's over, you basically have two gaping doorways on either side of you like a phone booth. Without warning, your eyes close and fade into your hardening exterior, leaving you blind. Suddenly, though, a camera that's been getting wired up into your systems gets activated, and you can see your own interior. There's a little bench-like protrusion sticking out your back wall where people will sit to make their wishes! You really are pretty much on your way to becoming a photo booth, or rather a magicalized version of one.
Finally your nostrils close up on your outside and get replaced by a couple of slots on your inside, for coins and bills to be inserted. You see with your inside camera that your clothes have been reworked into a couple of curtains on your doorways, just like what you might see on a photo booth. But you are not a photo booth. You are a transformation booth. New knowledge gets downloaded into your electronic brain about physics and anatomy for just about everything under the sun. You can't retain it all consciously, but you can feel a burgeoning power with in yourself, a confidence that you can transform practically anyone into just about anything they can think of. And as whatever's left of your remaining cell tissues and human metabolism gets replaced by inanimate matter, you feel yourself starting to lose power, a sort of fatigue beyond anything you'd ever felt as a human. You feel yourself starting to black out, with a few AI subsystems remaining on stand-by mode. One of those systems is your internal clock: you can tell that it's exactly 6:55:43.2 AM when you "wake up," so to speak.
You feel a jolt of power surge through your power cord and throughout your internal wiring. You feel strong, invigorated. Your camera comes online and you can see the genie sitting within you!
"Here we are, master, you're in the mall now. It's opening in less than five minutes! Good luck today, I hope you get a customer who loves transformations just as much as you do. Remember you still have two wishes so I'll probably catch up with you later. Maybe you'll turn into something else after ours and rub the lamp. Whatever. Just let me know how it goes when I see you again. Good luck in your first day as a machine!"