How can I fly in the sky?

try drinking Redbull, they claim to give you wiings! (not a misspelling)

or

you can do sky diving

or

you can do that new extreme stuff:

sky gliding

what the guy above me said :D i would also recommend six flags :D

Airplane. Hang Glider. Trebuchet, LSD

If you seriously want to get airborne but don't have any money, check with area hot air balloonist. A guy I know does ground crew work for them in exchange for occasional flights.

Buy a domestic flight ticket.

airplane