There are numerous places you could buy some. Target sells several varieties of "play sets" (which can be used with tea) or often at second hand or rummage sales you can buy a full set of flat wear for under $20.
You can. The taste of the kombucha will be different, of course. Make sure to brew the tea at the right temperature so your kombucha won't end up too bitter.
Mulberry leaf tea is a green tea, and a very healthy one to boot. The only catch is that the leaves must be washed very thoroughly before using them. Mulberry...
It is traditionally unacceptable to wear a dress that is less than thigh length, so consider this when deciding on your outfit as to not offend anyone at the tea...