I noticed the Delphi Carnival has a ferris wheel that's not clickable. Why let extra space on the map go to waste? It's a chance to have a ferris wheel page. I'm unsure of what the feature would be like exactly, though.

Maybe it could be something like the nature walk in Riverside? Various stages of going up to the top, looking out over the carnival grounds and having to spot certain things.

Although that's still not really much to do, since the nature walk doesn't have anything you can actually click on. I agree it would be nice to see it used for something, just not sure exactly what would be good.

Maybe you could pay some sP per pet, ride it, and then all your pets' happiness would go up to 100%? Just as a little thing to do with it, I guess.

For some reason, my mind jumped to Pokemon Black and White's ferris wheel. Basically, you got on a ferris wheel with an NPC and they talked to you for a bit.

Kind of like that feature, what if there was a pool of random or set NPCs that would join you for a ferris wheel ride? They could say something short and interesting and then give you something small. It could be a once a day thing.

I don't know how possible this is, but it's just an idea.

I'd take the coaster instead. It's a lot more exciting :P Maybe your pet's speed will increase after a ride, who knows?