Pickup Object/Collisions

Hi Guys!

I’m new to UE4 and have a bit of a noob question. I pickup a block and hit another block and the block that was hit moves across the screen. I am trying to make it so that when I hit the second block it stays in the same place and does not move. I have tried editing the Collision and Physics settings but have had no luck. Could someone point me in the right direction that I should be looking in?

Many Thanks,