Pros : Easy to fill with frit. Different color greens make very interesting pieces, no one is alike.
Cons : It is not easy to add the spots on the back of the frog, because they then to move around when the main color is added.
Other Thoughts : It is so much fun to make them. My mom had had an affinity for frogs, and I gave one to each of my sisters and my daughter on Mother's Day. It was like having our mother with us on that day.