Something I'm not sure about in your post, or in the responses, is whether or not you're wanting to talk about "spin casting", as you mentioned, or "spinning", which from my perspective are two separate things.

Spinning rods - large guides at the reel end, smaller towards the tip, to accomodate the spiraling of line off the open spool .

Spin CASTING reels are sort of a hybrid, basically with a spinning reel with a housing over the spool and an exit hole for the line to run out of. You could get by with a bait casting rod for these, but I think the packages some of us buy for our kids actually come with a rod built like a baitcaster but with some of the oversized guides, mounted on top.

Also, bait casters and spin casters both mount with guides on top and a trigger grip (or whatever you call it) underneath the reel seat for more leverage when casting.

I hope this helps....it confused the hell out of me when I wrote it.