Unwind about 10 metres (thirty feet) of thread from the bobbin, and stand with your back to the wind.
Hand your kite to your friend, and send them ten metres down-wind.
Your friend faces you, and holds the kite above their head. They do not throw the kite into the air.
Apply a little tension to the line, then shout "let go!" to your friend. They do not throw the kite into the air
, but merely let go, take a step backwards, and leave it to climb by itself. You can then unwind more thread as you wish.
For a more detailed description of launching, alone or with help, please check my earlier Instructable
For a more in-depth discussion of kite safety, please read this other step
from the same Instructable.