K'nex Krazy

8ft K'nex Chinese New Year Music Wheel - Year of the Snake

Made in our office for Chinese New Year 2025 - The year of the snake. 8ft high, 5000+ pieces and powered by a desk fan. See also our 8ft Christmas/Lego Ferris wheel, and 8ft Australia Day Animation wheel

8ft K'nex Animation Wheel: 5000+ pieces, 48 frames

For Australia Day, my office desk buddy and I converted the fantastical 8ft motorized Christmas K'nex+Lego Ferris wheel, which before that was the 8ft "stone" that literally rolled across our office entry (a nod to the Easter story), into an Australia Day wind powered 8ft animation wheel.

The strobe light flickered on one frame at a time as it came past to reveal the animation without the scrolling blur.

The video couldn't capture that in real life for the frame rates did not sync with the strobe rates...
But it real life, it mostly worked 0 but gave you a headache pretty quick!

See it in action: https://youtube.com/shorts/jIi9IDwKmZs

K'nex Kafé Koaster: 4m high, 14m long, 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.

Highest point is over 4m high, 14m of track - it really made out stall amongst 30 others stand out!!

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.

K'nex Roller Coaster Mask

During COVID, we had a workplace Zoom staff meeting with a “Crazy Mask” competition... I won!! 🙌

"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 Teddy Bear Transport Wheel

The ultimate in Teddy Bear travel - by KnexKrazy.com

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 ).