Take 6 rolls of Andrex and set up a stall in the hotel reception, sell the toilet tissue by the square, you will come back a very rich ten year old.
(The loo Roll is like nothing you have seen before)
Bumsoreski
You are going to have SO much to do you will need all the beauty sleep you can get !!!! Im assuming from your name that you are a girl ??!! You will be so busy skiing or boarding in the day in all that lovely deep snow that you will find it hard to find the time to do anything else !
There is a bowling alley that anyone can use quite cheaply in the Samokov plus swimming there and in the Rila. My boys are 12, 9 & 2 and we all went last year. They cant wait - you won't be bored ! Honest. The thing they liked best was sledging at night. We took a couple with us from costco and could have sold them a dozen times over at a vast profit!!