Answer:
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
Thirty men and ladies two, gathered for a festive do; Dressed quite formal, black and white; soon movement turned to nasty fight.
What is up that’s also down? What’s a smile and a frown?
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
People take me on walks and I run and have fun. What am I?