I put stuff by Alle's tank and trained him to surface for noms with two taps to the hood. He seemed to enjoy it :B
Now Alle is soooo outgoing and such a flirt, I live in a dorm and whenever friends are in my room he gets so excited when they come up and chat with him!
My suggestion (if possible!) is to simply keep him near you. That's what Im doing with my skittish boy atm. I have him on my desk, so I sit on my laptop or draw by him so he can watch me at a distance and get used to ...me XD It seems to be helping! Stuff like that will help. Talk to him, too, he'll begin to like your voice c: <3