Ours are now 6wks - and over 1#, so they're bodies are getting more than my one hand can grasp!
I try to 'scoop' them up using my right (dominate) hand then their feet go between my fingers and my palm holds their chest in my left hand. Right hand then slides up to hold wings and then I can 'cuddle' them against my body so they don't go flying out. Yes, mine are now fledged and willingly fly across the run to get at a tasty treat!
I imagine as they get bigger, when I cuddle them against my body, they'll get closer and closer to my elbow - need to remember to have a jacket or long sleeves on when this happens. Mine are very attracted to moles on skin! Ouch! (Maybe they won't notice when I'm more tan?!)
Hope this helps!