My latest ball machine- Balls That Play The Piano- did not work out.  The reason why it failed is because I tried to build it on furniture (a piano).  I find that K’nex and furniture are not compatible because it is hard to build K’nex structures that can accommodate the inconsistencies of furniture sizes and shapes.  Here are the reasons why some of my earlier failed ball machines failed:

-Ball Machine in the Dining Room- I tried to build on countertops which like furniture are hard to build on because of inconsistencies.

-Crazy Moment- I tried to build it on a rug which in that case was an uneven surface.

-Trampoline Factory- I tried to build it on a rug which in that case was an uneven surface.

Here is a link to the history of my ball machines:

A Short History of My K’nex Ball Machines

Here are some pictures of Balls That Play The Piano:

Front View of Balls That Play The Piano

Click Continue Reading to see more pictures

View of a keyboard the balls were going to roll on

Side View of Balls That Play The Piano

View of the floor of Balls That Play The Piano

Another view of the floor of Balls That Play The Piano

-Knextus