I guess this one is most popular rhyme... at least in India. Every little child, as soon as it starts going to a play school, and often before that, learns "Twinkle Twinkle'. Most of them are taught only the first stanza, though. That's the length of poems preschoolers are most comfortable with:
Twinkle twinkle little star
How I wonder, what you are
Up, above the world so high
Like a diamond in the sky.
As write these lines, I can remember innumerable little kids, children of relatives, friends, friends of friends, and everyone in between, singing the rhyme, enjoying the imagery, with their little fingers opening and closing in that 'twinkle twinkle' gesture! This one is a real fun poem for little children.
But there is a little more to it, which some learn and some don't. And there are some variations to that 'little more' too. Here is the variation that I had learned when I was a kid. It went like this:
Twinkle twinkle little star
How I wonder, what you are
Up, above the world so high
Like a diamond in the sky.
When the burning sun is set
And the grass with dew is wet
Then you show your little light
Twinkle twinkle all the night!
Does your version matches this one? If it doesn't, I'd love to learn that one too!