Every time you add someone & include their birthday then they already have an event on their profile. Of course "the child" & both parents appear under "people". If grandpa & grandma & maybe some aunts & uncles were there you can edit this event & add them. When you edit this event & add people...it appears on all their profiles too.
Again you can state the date, location & people who attended. You can also add a description, photos, videos & comments.
When it comes to adding photos or videos...you can either upload new ones or link to some you've uploaded previously.
If you add schools & include dates these will automatically become events. If you add jobs & include dates these will automatically become events. If you add someone's wedding date this event will be automatically added to both profiles (husband & wife). And if you edit one it'll automatically edit the other. This is also true if it's a holiday & several went...if you edit one event you edit all duplicate versions of it. Finally if you add someone's death date & burial date that'll create 2 events...death of & burial of. Whoever was there when the person died could be added under death of & whoever was there for the funeral could be added under burial of.
For things like trips to Disneyland or sea cruises...there's no where on the profile to add them & dates. So for things like this you have to actually create an event...name it...etc.
Every profile or memorial has a mini version of this timeline on it specific for that person. If you go up top & click on the tab "timeline" you'll see all these mini versions combined together. And as with I believe all tabs there's some links underneath...family, friends & your own. These are filters. Then on the side of the page are even more filters.
If you got any questions...feel free to post 'em. :)