---
product_id: 92675932
title: "Fortress"
brand: "rokr"
price: "AR$133952"
currency: ARS
in_stock: null
reviews_count: 5
url: https://www.desertcart.com.ar/products/92675932-fortress
store_origin: AR
region: Argentina
---

# Smooth marble transport mechanism Precision laser-cut gears <1/5000 inch error 6-hour immersive build experience Fortress

**Brand:** rokr
**Price:** AR$133952
**Availability:** ❌ Out of Stock

## Summary

> 🌀 Elevate your puzzle game—where engineering meets artistry!

## Quick Answers

- **What is this?** Fortress by rokr
- **How much does it cost?** AR$133952 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/92675932-fortress)

## Best For

- rokr enthusiasts

## Why This Product

- Trusted rokr brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dynamic Marble Run Mechanism:** Turn the handle to watch marbles ascend smoothly through an intricate gear-driven tower coaster.
- • **Engaging 6-Hour Build Challenge:** A rewarding hands-on project that sharpens focus and creativity, perfect for mindful downtime.
- • **Reliable Support & Quality Assurance:** Industry-leading craftsmanship backed by responsive customer service and replacement parts within 12 hours.
- • **STEM & STEAM Inspired Creativity Booster:** Ideal gift for adults and teens who crave sensory stimulation and mechanical puzzle mastery.
- • **Precision Engineering for Seamless Assembly:** Laser-cut wooden pieces fit perfectly with less than 0.02mm tolerance, ensuring a flawless build every time.

## Overview

The ROKR 3D Wooden Tower Coaster puzzle is a precision-engineered mechanical marble run kit designed for adults and teens. Featuring laser-cut wooden pieces with ultra-tight tolerances, it offers a smooth, gear-driven marble transport system activated by a hand crank. This 6-hour build combines STEM principles with creative sensory engagement, making it a standout gift and a captivating hands-on experience. Backed by detailed instructions and responsive customer support, it guarantees both quality and satisfaction.

## Description

Full description not available

## Features

- [ROKR TOWER COASTER] Tower coaster has a more dynamic shape，it is highly praised in the ROKR marble run series.As long as the handle is turned, the unique mechanism can transport marbles from bottom to top in an orderly manner.
- [INTERLOCKING DESIGN] Working in tandem through gears and organs. Sanding the gears with sandpaper and wax it will make the model kit rotate more smoothly.
- [A CREATIVE GIFT] Our marble run kits make great sensory stimulation toy gifts and STEAM & STEM puzzle gifts for adults and teens.
- [QUALITY THROUGHOUT] ROKR utilizes industry-leading technology to produce best 3d wooden puzzles.All pieces are laser-cut and the error is less than 1/5000 inch,make sure each part fits tightly.
- [DETAILED INSTRUCTION] We offer a detailed how-to booklet.It will take about 6 hours to build up this 3d puzzle for adults.
- [SERVICE] ROKR offers replacement of damaged parts.If there is any problem, we will help to check and provide guidance.we will reply within 12h.

## Images

![Fortress - Image 1](https://m.media-amazon.com/images/I/81VzJMnc5OL.jpg)
![Fortress - Image 2](https://m.media-amazon.com/images/I/71Pp2qsE9BL.jpg)
![Fortress - Image 3](https://m.media-amazon.com/images/I/818zIbb1LuL.jpg)
![Fortress - Image 4](https://m.media-amazon.com/images/I/817-F4NwXyL.jpg)
![Fortress - Image 5](https://m.media-amazon.com/images/I/81HiKx1VH8L.jpg)

## Questions & Answers

**Q: Does this kit require glue?**
A: I used glue on a couple of pieces for stability. Primarily where I was splicing track pieces together.  When I was punching out some of the skinny pieces on one of the sheets, I had to re-glue some of the layers together. I used some simple clips and Elmer's glue to put it together.

I built this as a project to see if it would be a good activity for my granddaughters. They are only nine, so the early steps would be easy enough but the final assembly is way to complex for their age.

**Q: Do these do well in hot/humid locations for extended times?**
A: Hot environments would be OK. I would not recommend too humid environments since over time, wooden parts may start to lose their shape depending on the level of humidity of course. Probably keeping this item in a sealed case in such places would be a safe approach. I hope this helps.

**Q: Is a motor kit is available, please give the link to it?  Thank you.**
A: No motor can be readily attached to this. However, if you are good with DIY, a simple DC motor can be attached to this. I would use a motor with a gearbox to slow down the rotation speed though.

**Q: Can you connect the different kits together?**
A: No

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent project for those who are looking for a challenge, this is it.
*by G***N on January 28, 2020*

This was an incredible project. The laser cut ply board is some of the finest plywood I have worked. Their precision laser cuts are spot on. As I built the kit I continued to be fascinated with the engineering that goes into mechanical kits like this one. It is fun, it is rewarding and most certainly will boost your confidence level. My neurologist prescribed this EXACT kit to help work my fine motor skillsI am a wheelchair dude that has a serious neurological disease. My hands shake and parts fly! My wife picked up so many TINY parts off the floor. My point is if I can build it.... you can as well.

### ⭐⭐⭐⭐⭐ Terrific Project to Build! Patience to Build But the Reward is Worth the Time
*by E***R on June 1, 2020*

Quick Summary: Terrific sturdy contraption that is a feast for the eyes. Build will be lengthy but with patience comes its just rewards.I'm a big fan of building contraptions and having gadgets that you can see work before your eyes. This ROKR 3D Wooden Puzzle-Mechanical Model-Wooden Craft Kit is a perfect contraption for kids and adults to own and enjoy watching. It's completely hand driven (no batteries) so if built correctly, you'll be able to watch this contraption run as long as you're cranking the winch. The entire build is made with wood and the material is sturdy, and it measures approximately 8"x9" give or take.During the build process, I unfortunately broke one part but it was a tiny piece the size of a grain of rice and luckily they have plenty of spares; probably assuming users might break this part a lot so better to have extras than only one piece. The build did take a LONG time and it does get pretty tedious with the tiny parts, especially when inserting many tiny pieces in. They provide all the material you need and you don't need any of your own tools to help build this. They also provide some wax as a lubricant in some of the gear pieces so it can run smooth as well as a piece of sandpaper to carefully wipe away any splinters, so that's useful. Your nails will get a bit sore overall but once you have it all complete, it is totally worth it.Once it was complete, running the contraption was a piece of cake and enjoyable to watch the balls run continuously over and over. Depending on how you build, you might notice sometime that the ball stops but just adjust the piece that is not positioned correct and it'll fix the issue no problem. Running it for a couple minutes had no issues with anything breaking and is a perfect eye catcher for visitors. An interesting thing about this contraption is there's actually multiple routes the balls can go so every time a ball passes through, it'll change every time.If you're a fan of building and even Rube Goldberg-like contraptions, this gift is a perfect gift for you or your family builder.

### ⭐⭐⭐⭐⭐ Beautiful product fun to build
*by E***C on November 23, 2020*

Awesome design, beautiful engineering, excellently machined. I had fun putting it together and the finished product is a nice shown piece. Fairly relaxing to watch it run. Couple of points:1.You need to do it slowly and patiently, if you are the sort who gets easily frustrated, stay away2.Follow the instructions carefully. They are all visual instructions which could be printed a bit larger. I placed one slab in a flipped position in the base and had to disassemble a bit to correct it. As an aside if a part of the construction is not fitting, it is because you made a mistake.3.The accessible support videos could be better, they are very fast and not easy to play slowly.Never the less it is a good challenge leading to a nice show piece.

## Frequently Bought Together

- ROKR 3D Wooden Puzzle-Mechanical Model-Wooden Craft Kit-DIY Assembly Toy-Mechanical Gears Set-Brain Teaser Games-Best Gifts for Adults & Teens Age 14+(LG504-Fortress)
- ROKR 3D Puzzles for Adults,Wooden Marble Run,3D Wooden Puzzles for Adults Kids Ages 12-14,Wood Puzzles Adult,Model Kits for Adults,STEM Projects for Kids Ages 12-16,Home Decor Hobbies for Men Women
- ROKR 3D Assembly Wooden Puzzle Brain Teaser Game Mechanical Gears Set Model Kit Marble Run Set Unique Craft Kits Christmas/Birthday/Valentine's Gift for Adults & Kids Age 14+(LG503-Lift Coaster)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-01-24*