Posting of events that you do with your friends or events that happen to you that you want all your friends to see is something you do on Social Media Platforms that will not translate well on Messaging Platforms. If your child were going to Disney world and they wanted their friends to see , they would probably posit it on Snapchat instead of a group chat that I doubt has everyone they interact with on Snapchat (especially if some of their friends have android devices)