I thought it would take quite a while to disassemble a house that had taken many months to build. You know, bit by little bit. Wrong. This machine with lower and upper jaws just took a bite out of a wall and the whole thing snapped into matchsticks like you would crumble a graham cracker in your hand. We were in awe. The kids were delighted. It was a teachable moment that was so worth being late to school for.