Vacuum effect

Hi! I'm looking to create an effect similar to the bolts in Ratchet and Clank or the studs in the Lego games where the items are drawn towards the player like a vacuum. Ideally, I'd like to be able to add some fluid, dynamic direction to the sucking up motion so it gives a natural feel. Any thoughts on how to approach this?

 

The simlest way to do it is to use "overlap sphere" to find rigidbodies within attraction range and then apply attraction forces to them within FixedUpdate. That would create a "black hole" sort of effect.