TL;DR
To breed frogs in Minecraft, feed two frogs a slimeball each. One frog will lay frogspawn on a water block, which hatches in about 10 minutes into 2–5 tadpoles. Keep tadpoles in water, feed them slimeballs to help them grow faster, and move them to the right biomes to get all three frog types: orange, white, and green. Frogs eat tiny magma cubes and drop froglights in different colors.
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