out of a hat

"i wish i had a top hat filled with small pieces of paper with either XX or XY written on it and that no 2 pieces were exactly the same" suddenly the hat appeared on the bed "ok i have a hat full of paper time for part 2. i wish that whenever i take a piece of paper out i will transform into either a boy or girl depending on if the paper says XX for girl or XY for boy and that the difference in shape size and color of the paper affect appearance" the hat began to glow but soon faded away "lastly i need a failsafe. i wish that if i turn the hat upside down letting all the paper fall to the ground i will become me as i am now" one last glow swept over the hat thus completing the wish "now to pull a piece of paper"