Home Page- Slide Template?

It’s only my second day! I seem to have messed up the Slider Function part of the homepage and I don’t know how/where to reinstall that one part. And it greatly affects the look of the blog. Appreciate any help to fix this. I did delete a bunch of posts (I paid to have these demo installed so I was trying to go back in and clean them up). Once I realized there was a problem, then I restored all the posts from the trash. I’m guessing the ones with the slider are special somehow though- featured? Besides how to fix, I might need to know what NOT to do so I don’t do it again. Thank you! http://www.kidminflipped.com