You can try to use it with glue or without glue, but using glue will be more natural looking. Some sisters don`t use glue because their hair is secured with a custom strap and comb in the back and got2b glued spray. So it's very secure and doesn`t move at all. And you can also choose got2b glue gel (black bottle) to install it. As for the ponytail or bun, definitely yes, you can make it.