A good Christmas for my sister

Hi everyone, im trying to give my sister a great Christmas this year, but sadly im all broke.. I wanna surprise her with a real big Christmas Tree in our house, and my mother already allowed me to have it inside, as long as i paid it myself, because she knows that im all out of money. Any amount would help, and i dont know why it wouldn't let me put less than 100$ in the goal, but i dont need that much money, because a Christmas tree shouldn't cost much more than 30-40$, so any amount would make me very happy, i just wanna wanna see my sisters face when she walks into the house and see that big Christmas tree standing in the living room.