"No, but you've got a bed and your own space. I'd be happy here."

Don't think too hard about what he's saying Felix, he's too little right now to mean anything innuendo-ish about it. He just means it's your space and you'd be there, ergo it would be awesome. The other benefits will have to wait until he's properly aged again.

"Neat! What do we need to make it work? Eye of newt? Raven feathers? Sugar, spice, and everything nice?" He doesn't know how magic works, despite all the time he's spent with Felix. If he wasn't so goddamn excited Felix might be forgiven for thinking Jim is teasing him.

He just wants to do things and better yet possibly help Felix do things!

"How can I help?"