A syllable is a part of a word pronounced as a unit. It is usually made up of a vowel alone or a vowel with one or more consonants. The word "Haiku" has two syllables:
"Haiku" is a traditional form of Japanese poetry. Haiku poems consist of 3 lines. The first and last lines of a Haiku have 5 syllables and the middle line has 7 syllables. The lines rarely rhyme.
Here's a Haiku to help you remember:
I am first with five
Then seven in the middle --
Five again to end.
Then seven in the middle --
Five again to end.
Because Haikus are such short poems, they are usually written about things that are recognizable to the reader. Animals and seasons are examples of recognizable topics children might enjoy exploring.