Through the nursery rhyme "Counting Frogs", children can not only know how many legs, mouths and eyes a frog has, but also learn to count and know numbers, and can also stimulate children's concept of multiplication. I remember this nursery rhyme was learned by multiplication formula in 1999 when I was a child. Of course, the frogs in the lyrics can be changed into puppies, cats, chickens and ducklings and become "counting dogs". Cultivate children's observation ability.