Answer:
What is flat, usually square, and made from trees but isn't wood?
For all your post bubble-Βbath drying needs
I am something that floats. But after a period of time I fall.
A single seater best accompanied by circus music and great balance.
Even the oldest ones can be described as current, but a little mainstream.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.