Blue gold - Cannot be picked up by Jake, but he still must remove them from the level in order to complete it. He must find a way to destroy it.
Blue teleporters - These have no effect on Jake, but they do teleport monks.
Blue small bombs - Can't be picked up or lit directly, but can be lit by another small bomb (of any color) explosion. Very useful for chain reactions, since you don't have to tuck the bombs away in hard-to-reach places.
Gold large bombs - Unlike normal large bombs, these cannot be lit by a small bomb (of any color) explosion. This seems a bit inconsistent, but that's the way it is.