I love zipping down the Quad at Linq Hotel. It is a very "Non-Strip" street in the heart of the Strip.
In that jaunt, Kitson is one of my favorite places to check out. Granted, it is filled with tons of touristy crap, and silly gag gifts, but you can find some really fun stuff here if you take the time to wonder around.
The inventory is everything from gag shot glasses to clothing. They have an awesome kids section if you are lucky enough to have a little one to spoil!
Definitely worth a walk through if you are in the area!