Every summer, my brother and sister and I go to the river to play. We often see little frogs. My sister always asks me like a "hundred thousand whys": "Sister, do you know how tadpoles become frogs?" I only know its changes from books, but I haven't actually read it, so I can't answer it for the time being. So I caught some tadpoles from the river and said to her, "Go home and see for yourself."

When I got home, I found a glass jar to put them in, and I also found some aquatic plants to keep me company. Seeing them happy in the water tank, they seem to have adapted to their new home.

Two days have passed and they haven't changed. I was a little anxious, so I asked my father why they haven't grown up yet. Dad said calmly, "when they grow up, we can't force them, just like you can't have a baby early in your mother's belly." See what changes it has every day! "Finally, after four or five days, I suddenly found that there were tiny feet on the tail of the tadpole, like two strings. I immediately called my sister to see it, and she was also very excited: "Little tadpoles have long feet! " "

But it didn't last long. After two or three days, I found that they were all covered with small peas. I thought they were ill, so I called my father and asked what was going on. Dad said, "They are toads, not frogs, but they are also good helpers for crops. Tadpoles that become frogs have longer tails. " I don't believe it. In order to verify whether my father's words are true or not, I went to the river to catch some tadpoles with longer tails and put them in 1 cylinder, and put them in cylinder 2 with shorter tails.

Now a few weeks have passed, and the tadpoles in my little jar have changed. Indeed, the slender and smooth tadpoles in tank 1 turned into frogs, and the short and rough tadpoles in tank 2 turned into toads.

I solemnly told my sister the difference, but this is the first time I understand that the frog's youngest son is different from the toad's youngest son.