When I was five my Dad used some kind of a good glue to put together a set together so I didn't loose any pieces. Putting the ethics of that action aside, I want to split the bricks from another and remove the glue. I tried heating up the set in boiling water but the glue didn't budge. Any ideas out there?
You can try using some nail polish remover to try to start breaking down the glue.
From Removing Super Glue, which they give for advice for people that accidentally glue their fingers together, this procedure might also work for the bricks.
A lot will depend obviously on how much glue was used inside the bricks, but perhaps a little crack and a small screw driver to help pry them apart and keep applying the acetone to the reachable edges can help break them apart.
I don't know if acetone will do something to the brick's color or structure, so proceed carefully.
Well, maybe you could try using a nail in between the bricks. I personally have never glued legos together, so I am just giving an idea. Odd, right?