Simple wooden blocks can
be stacked so that the entire top block extends completely past
the end of the bottom block seemingly in dramatic defiance of gravity.
To achieve this the visitor makes a vertical stack of 16 blocks.
The top block can be slid to the side for half of its length and
still remain balanced. The top two blocks can then be slid 1/4 of
a block length further, the top three 1/6, and so on down the stack.
The displacements of the blocks follows a mathematical series. The
mathematical series describing the stacked blocks follows a simple
pattern. 
