K'nex Krazy

K'nex Kafé - a gazeebo roof-top Roller Coaster and Ferris Wheel

I was asked to create a K'nex roller coaster for a youth group's hot dog fundraising stand, and this is what I built them. It fascinated the children and adults alike... and they sold out.
Most common question: "How long did that take to create?" (About a month)
Children could ride the roller coaster for $5 - but had to be under 2cm tall to ride.

Pinball Pluss - K'nex Arcade Modification by K'nex Krazy

We added a skill shot, and three other extra ball jackpots to hit to the K'nex Arcade Pinball set.

"LOOPER 20-20" - a 20-loop K'nex 'shuttle launch' roller coaster.

Possibly a world record for the most consecutive loops in a K'nex 'launch' roller coaster. (the launch is at the end.....haha :)
20 loops, built in 2020

20 consecutive loops
6300 pieces
17m gravity run-up
30m total land distance
48m track distance

Upside down K'nex roller coaster model

Yes, you would die on this coaster in real life.... It has a forwards and backwards loop, both from the upside down position, and two corners to fling you out of the coaster.

I built this quickly after the Goofy's Sky School copy - while I had the scaffolding up.

Goofy's Sky School K'nex roller coaster

Loosely based on Disney California Adventure's Goofy's Sky School / (previously Mulholland Madness).

I built the frame first and then lift hill, then removed scaffolding as needed.

K'nex Underwater Turbine Test

Just testing how a 'windmill' would spin underwater over some vertical jets in the floor of the pool.

The "Stair Master"

Stats:
Ball Towers:
6 meters tall (almost 20 feet)
4300 pieces

Cross-beam:
2.5 meters wide (over 8 feet)
1300 pieces

Stairs:
33 steps down
7 corners
1400 pieces

Totals:
3 levels
7000 total pieces
1-day install

K'nex Krazy Krane Ball Tower

Has a user controlled crane and auto lift ball tower

6 'automatic' tracks:

Vortex
Ladder drum
Spiral seesaw
Looper
Roller coaster
Random wall (resets on third ball - odds of positions: 1 in 128, 18, 6, 3.5, 3.5, 6, 18, 128)

4 additional crane tracks, with auto ball-stopper/swapper for crane

Base sets:
Big ball tower
Power Tower Crane

Additional pieces:
Roller Coaster (original)
Scremin Serpent
Big Air Ball Tower

K'nex Hoberman Sphere Expanding Ball

So, I saw my daughter's plastic expanding ball (Hoberman Sphere) and pondered if I cold make one.
I gave it a crack over a few nights, 2484 pieces, and when i had build one half it looked promising. However.... see video. It seems the twisting of the joints was impractical to manage.

K'nex Self Swing

I wondered if a rotating weight would be enough to make a swing swing all by its self, just like humans can. Not bad. Will try a 'proper' attempt some day.

"Nudge" K'nex ball roller

A little ball contraption built in a few minutes while waiting for lunch.

K'nex Fidget Spinners

K'nex Perpetual Spinner

With a little less friction, and breaking the laws of physics, this knex contraption would actually spin forever without the motor running...
Ok, so there was no intention to make this into a perpetual motion looking machine. This was a quick build while some friends with kids were over.

K'nex Teddy Bear Ferris Wheel

After building the regular Ferris Wheel from instructions, and modifying for a school project (turning it into a wind powered wool winder) I thought my Daughter's teddies would like a ride. So we raised it and widened it. And in an effort to become a multi millionaire I put the fun book I wrote on it as a fitting product placement... (I'll settle for two sales: www.theparkqueues.com ).