Have you ever had that time where you're building something really big, but then make a mistake? So you take out your wand and miss and destroy whatever is behind it. If so, you know how annoyed you get for rebuilding whatever was behind.
So, my idea was this: When you take out your wand, whatever brick you're pointing at will glow up so you never miss your mark.
It would be very helpful for poll bricks or any tricky bricks with rounded edges.