How can child reach parent object position and stick on it? I'm going to make an animation of the stone golem creation. Each stone on the ground flies up and reaches parent's position. I mean one stone should be placed on foot, another on arm etc etc. I want to every stone smoothly reach specific place on the armature while golem wakes up.

How can I make this kind of effect?
You can do this using Child of constraint. It works like parenting, but it has influence value. If influence sets to 0 object is free, if 1 - object follows to target.



You can make smooth transition between parenting and free position by animating this value: