Just making simple globes was quite the challenge, sort of like blowing bubble gum, rubbing your stomach, patting your head and walking down the street all at the same time. None of the items difficult but remembering to do them all with equal concentration, takes some practice. The breakage to success ratio about 1:1. At first they were too small, then they looked like elephant man mutants and finally a large, somewhat even globe and the glass was too thin to survive trimming. This is really a craft where it’s much more difficult than it looks!