R.J.
Well... they're a lot less expensive than $700 for a real pottery wheel... but my understanding is that they don't have enough power to actually "center" clay (typically at least 1/2 - 1 horsepower engine is what's used on student and professional models)... and the general word is that kids get very excited about them, and then hate them, because they don't work to throw... just to spin. ((One needs the centrifugal force to actually center and then pull the clay upwards)). Neither from Kohls actually has a "splash pan" that is set up to work, either. So there will be a LOT of mess. And it's not something you want to do in the bath (clay clogs drains), so it would need to be an outside activity if you were using actual clay. Pottery is super messy even with a splash pan. Without one... oy. Mud from head to toe and splatters several feet in every direction. Even with a weak motor. Think "splatter paint"
Pottery is a difficult thing. Centering is hard work (I center the clay on the wheel for any kid's classes I've taught), and that's even with enough horsepower to spin it fast and hard enough to lean into it. Put your hands together like you're about to dive into a pool. Then push on a wall (palms on the wall) as hard as you can with *all* your weight behind you. That's the force it takes to center even a FIST sized piece of clay. (Ironically, because of physics, it doesn't take much more force to center 10 or 20 lbs of clay... it's just a size issue... using your long bone of your forearm or a tool instead of one's hands because hands aren't big enough). But yah. A LOT of force that needs a strong enough spin.
For this kind of toy, they look great for PAINTING a preexisting piece... but I wouldn't want to attempt to actually MAKE a piece on one of them.
I'd suggest, instead of the toy, to do a kids pottery class through a local community center. About the same price, far better value.