It kind of depends on your snake. If, after the settling in period and first meal, he comes out, curls up around your fingers and is perfectly entertained doing that, I'd say you can keep him out up to an hour, with you sitting doing something, with the snake wound around you. If he's more active, and you have to constantly keep repositioning him, and he wants to go go go, then he's also burning a ton of calories he needs for growing, so I might limit that kind of thing to 30 minutes or less. It's ok to handle every day except for at least 48 hours after feeding, (but it's ok to handle him to remove him from his feeding bin and replace him in his viv) but if you handle twice a day, then I would keep the handling shorter, say ten to 15 minutes or so.