Life begins amid a clutch of floating eggs. Those that survive hatch as tadpoles, and then undergo a rapid change as they lose their gills and grow legs. Life in the water is grand, but these amphibians will soon take to land, becoming adult frogs after 12 to 16 weeks. Scientific Name: Anura. Characteristics: Unlike the distinct stages that many insects cycle through, these figures show the rapid transition a frog makes from egg to adult. Young tadpoles are often mistaken for fish because they move so quickly in the water! The figures in this set are ideal to use as Montessori toys for lessons about biological processes and life cycles. Sizer: Maybe it is easy being green! These lifelike, soft figures show the shifting shades of a frog, complete with the 2" long adult. The Life Cycle of a Frog is part of the Safariology collection. All of our products are Non-toxic and BPA free.