Google has recently included Appear and Disappear to the animation options in Google Slides. Users can also now set the direction for both Fly in and Fly out. For more information on animations, see Animation Improvements in Google Slides.
Google has also recently introduced Google+ Collections. Every collection is a focused set of posts on a particular topic, which provides an easy way for Google+ users to organize their interests. Collections can be shared publicly, privately, or with a custom set of people. Once a collection is created, the user's profile will display a new tab where other people can find and follow collections. For more information on Google+ Collections, see Introducing Google+ Collections, a new way to group posts by topic, and, Find and Follow Collections.