Since his first birthday, we've taken our little one on anything without a height requirement. He's never had an issue with a thing. At a few months past his second birthday now, his MK favorites are actually Pooh, POTC, and Haunted Mansion. Like most of these kind of questions, it's going to depend on your child. Only you know what might scare your child. To be honest, I think if you make it seem scary or put too much into trying to keep them from possibly getting scared, your child is going to think it is. 
