K’nex: Surprise Box

Jelle Bakker made a Surprise Box for marbles (be sure to check out his You Tube channel.)  I thought it was really cool, so I decided to make my own out of K’nex. (I am even making one for marbles!)  Here’s how it works:  First, a ball enters through the top, but doesn’t exit out of the bottom.  Then a second ball enters through the top, hits a bell, and then exits out the bottom.  When a third ball enters in through the top, surprise!  It exits out the side along with the first ball.  Below are some pictures and the video.  Note:  I filmed and took pictures of the Surprise Box while it was attached to my upcoming ball machine.  Click Continue Reading to see the pictures. Continue reading

K’nex: In and Out Spiral Instructable

My latest Instructable is for a simple K’nex ball machine element called the In and Out Spiral.  I call this element the In and Out Spiral because the ball enters close to the back bone, and as it goes down, it moves out away from the backbone but then moves in toward the backbone as it exits.  Below are the link to the Instructable (be sure to click on it)  and some pictures:

In and Out Spiral

Spiral 1

Spiral 11

Spiral 111


K’nex: Trick Flip-Flops Ball Machine Element Instructable

I made another ball machine element and an Instructable for it.  I call the ball machine element Trick Flip-Flops.  It looks like an element containing normal flip-flops. However, I call it Trick Flip-Flops because the flip-flops are weighted on one side and go back into place once triggered by a ball.

Sorry there is no video.  I just couldn’t get the element to stand up on its own for a video.  It will be in my next ball machine, though.  You can see it in action then.


Below is the picture and link to the Instructable.

Trick Flip-Flops Ball Machine Element Instructable


Trick Flip-Flops


Spacerail: Poleopolis

I built another of my own design Spacerail ball machines.  I call it Poleopolis because it has so many poles.  It contains my new dumper element.  I built my dumper element with my dad, and it is made out of wood and metal.  It takes 3 balls to tip the mobile track. See image below.

Dumper Element

For this Spacerail ball machine, I did something I have never done before: horizontal poles!  Below are the pictures of the two horizontal poles in this ball machine.

Horizontal Pole 2

Horizontal Pole 1

Below are more pictures of Poleopolis, and its video.

Front, Ground View

Front, Regular View

Top View

Back, Regular View

Back, Ground View