In this demonstration, broom handles simulate pulleys and it demonstrates the mechanical advantage that multiple pulleys provide.
Tie one end of a rope on a smooth stick like a broom handle or walking stick. Next, loop it around another stick and have the person holding the first stick to hold onto the remaining rope. It will look like this picture.
Now, stand about three feet apart. You will need to let out some rope.
Once it is set up, have both people pull back on each broom, and you use the end of the rope to try to pull them together. It is hard to pull them together.
But, if you loop the rope first around the stick twice, it is so much easier to pull the two together this time.
Even my youngest could pull his older brothers together.
source: Exploring Creation with General Science, Dr. Jay Wile