Frogspawn is pretty easy. The skeleton is very brittle and breaks very easily. With Frogspawn, I wouldn't recommend a chisel and hammer method. I've actually done that one and the polyps popped right out of the skeleton on impact. Not good. Usually, you can break the branch easily with your fingers. If not, a pair of kitchen sheers would work great. As Tony said, break as far from the tissue as you can. This will give your friend more options on where he wants it in his tank.