Unity 5 Networking Help

So i am new to networking and i am trying to wrap my head around how game objects are handled. Essentially i am trying to set the parent of a gameObject to the player which collided with it. Each player has an item slot (a Transform on their gameobject) and when a player walks into another object i want it to parent to that item slot. My problem is when i try this the item either just does not work or it parents on the server/client only. I have tried to parent the object using [Command]. Any help would be greatly appreciated!