OK these materials are redially available to me because I rock climb but most other materials are redially available at home depot and REI (I am in the USA so it might be different for you if you live elsewhere)that being said I AM NOT RESPONSIBLE IF YOU HURT YOURSELF ADULT SUPERVISION IS REQUIRED AND BY ADULT I MEAN RESPONSIBLE ADULT ALSO PLEASE JUST USE COMMON SENSE so with that all out of the way here is what you need...
1. rock climbing harness
2. 2 100 foot lengths of rock climbing rope or steel cable
3. 1 come along AKA hand winch
4. a couple caribeners (3-4 max)
5. a ladder
6. a large pulley