At that age, handling can be difficult just b/c of how active they are. But once he gets used to it, he'll settle down and let you carry him around. They do like to ride on shoulders.
I have 2 rex mix brothers myself. I'd like to get a dumbo or a hairless, or a hairless dumbo next.
Here's Tater and Sunny, my two lardbutts. They look extremely round in this pic. They are large but not as fat as they look. Being males they don't use a wheel or exercise ball. Since they are fairly furry, their "maleness" doesn't bother me as I don't see it that much. If I had a hairless it would probably gross me out a bit more.......... lol. They are loving their new ferret cage I got them for Christmas.