This film is a fascinating portrayal of one of a most wonderful transformations in nature. It was prepared by Raymond L. Ditmars, of the New York Zoological Park. It shows first the discovery by a party of children of some frog's eggs. The eggs are removed from the water, a jelly-like mass. Then they are placed in an aquarium, a myriad of black dots. The child magnifies the eggs and sees their progress from day to day. On the fifth day signs of life appear. Little bits of life are hatched from the eggs and sink to the bottom of the jar. On their first journey the little wigglers are shown clinging to a straw. Then are shown the pollywogs at the age of five months. Their mouths are rasps for scraping up vegetable matter. Then the change to the frog occurs. What really takes weeks is reduced to seconds. The final scenes show His Majesty. the Bull Frog, weighing 1½ pounds.
—Moving Picture World synopsis