---
product_id: 765078955
title: "Ravensburger GraviTrax Starter Set & Trax Expansion Set - Marble Run STEM Toy for Kids Ages 8+ - Ranked No.1 in The U.S"
brand: "ravensburger"
price: "$100.70"
currency: USD
in_stock: false
reviews_count: 13
url: https://www.desertcart.us/products/765078955-ravensburger-gravitrax-starter-set-and-trax-expansion-set-marble-run
store_origin: US
region: United States of America
---

# expandable & compatible sets 122 versatile pieces gravity, magnetism & kinetics Ravensburger GraviTrax Starter Set & Trax Expansion Set - Marble Run STEM Toy for Kids Ages 8+ - Ranked No.1 in The U.S

**Brand:** ravensburger
**Price:** $100.70
**Availability:** ❌ Out of Stock

## Summary

> 🎢 Engineer your own thrilling marble adventure—where STEM meets endless fun!

## Quick Answers

- **What is this?** Ravensburger GraviTrax Starter Set & Trax Expansion Set - Marble Run STEM Toy for Kids Ages 8+ - Ranked No.1 in The U.S by ravensburger
- **How much does it cost?** $100.70 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/765078955-ravensburger-gravitrax-starter-set-and-trax-expansion-set-marble-run)

## Best For

- ravensburger enthusiasts

## Why This Product

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

## Key Features

- • **STEM-Powered Play:** Explore real-world physics concepts—gravity, magnetism, and kinetics—while having hands-on fun.
- • **Seamless Expansion:** Add the Trax Expansion Set anytime to amplify complexity and speed without compatibility worries.
- • **Award-Winning & Trusted:** Join millions who made GraviTrax the #1 marble run STEM toy in the U.S., perfect for kids 8+ and adults.
- • **Build Limitless Marble Runs:** 122 precision pieces let you engineer endless track designs that challenge creativity and logic.
- • **Interactive App Integration:** Design, simulate, and get step-by-step building instructions with the innovative GraviTrax app.

## Overview

The Ravensburger GraviTrax Starter Set combined with the Trax Expansion Set offers 122+ pieces to build dynamic marble runs that teach STEM principles like gravity, magnetism, and kinetics. Compatible with all GraviTrax sets, it encourages creativity, problem-solving, and hands-on learning for kids 8 and up. With interactive app support and over 15.5 million units sold, it’s the top-ranked marble run STEM toy in the U.S., perfect for both beginners and advanced builders.

## Description

The GraviTrax bundle includes the GraviTrax Starter Set and Trax Expansion Set to enhance your marble run experience. The Starter Set has 122 pieces including metal marbles, card bases, tiles, curves, junctions, switches, a vortex, Magnetic Cannon, tracks, and more. Build action-packed tracks and experiment with gravity, magnetism, and kinetics. The set engages creativity, problem-solving, and STEM skills. The Trax Expansion Set adds more vertical blocks, curves, and tracks to create longer, faster marble runs. Challenge yourself to keep the marbles going as long as possible. Extend playtime and possibilities without worries over compatibility since all GraviTrax sets work together. With over 15.5 million units sold worldwide, GraviTrax is the #1 marble run brand in the US. Both sets encourage open-ended building for kids 8+ and adults. The Starter Set introduces the concepts while the Expansion Set extends the functionality. Combine both for unlimited marble run designs!

Review: Fun toy! - Good price and my kid loves this!
Review: Want to know what's in it? - Very happy with this so far. My only problem was not being able to determine exactly what was in it before buying it, so I will reveal that here in case others are wondering. Before I do, I will say that the associated app is pretty cool. It lets you draw out a track, lets you try it out, and then creates building instructions for it. I have tried to use the nomenclature found on the Ravensburger website in the following complete contents list: 18 gravispheres (steel balls - 9 silver, 3 red, 3 green, 3 blue) 8 base plates 2 transparent bases 2 small transparent bases 4 double balconies 16 balconies 2 long walls 2 medium walls 1 short wall 70 curve tiles 10 junction tiles (X) 2 3-in-1 tiles 4 Y-intersections/switch tiles 2 vortex tiles 16 base tiles - 8 are used for tunnels and 8 with other inserts - 2 straight tunnels - 4 curved tunnels - 2 Y-junction tunnels - 2 free-fall inserts - 4 catcher inserts - 2 splash inserts - 2 landing inserts 2 vertical u-turn tunnels 100 large height tiles 32 small height tiles 8 pillars 4 tunnel pillars 9 long rails 18 medium rails 27 short rails 3 curved rails (left) 3 curved rails (right) 2 dipped rails 2 drop rails 2 bent/Bernoulli rails with supports 2 long thin rails 2 long slow rails 2 finish lines 1 3-way starter 1 spinner 2 magnetic cannons 1 loop 1 scoop 1 hammer 1 vertical splitter (pro) 1 vertical mixer (pro) 1 helix (pro) 1 turntable (pro) I have only had it a few days, but it seems like a really good set to begin with, and there are still lots of other accessories that can be added. I already added spirals and trampolines, for example. Happy rolling!

## Features

- [GraviTrax: Starter Set] Build action-packed track systems for hours of fascinating fun with the versatile “GraviTrax Starter-Set”! This set includes 122 pieces to help build your Marble run.
- [INNOVATIVE] The GraviTrax interactive track system allows you to design and build your own race tracks and experiment with gravity, magnetism, kinetics
- EXTEND YOUR MARBLE RUN: With the GraviTrax Trax Expansion set, add more fun and excitement to your GraviTrax experience - Now, there's no limit to your marble run adventures
- INNOVATIVE STEM TOY: Encourages children to experiment with gravity, magnetism, and kinetics, fostering their interest in science while promoting creativity and problem-solving skills

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DNP5X8GP |
| Best Sellers Rank | #239,307 in Toys & Games ( See Top 100 in Toys & Games ) |
| Customer Reviews | 4.4 4.4 out of 5 stars (490) |
| Manufacturer recommended age | 0 - 14 years |

## Images

![Ravensburger GraviTrax Starter Set & Trax Expansion Set - Marble Run STEM Toy for Kids Ages 8+ - Ranked No.1 in The U.S - Image 1](https://m.media-amazon.com/images/I/51LegcVXCqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fun toy!
*by R***Y on September 11, 2025*

Good price and my kid loves this!

### ⭐⭐⭐⭐⭐ Want to know what's in it?
*by B***N on January 4, 2022*

Very happy with this so far. My only problem was not being able to determine exactly what was in it before buying it, so I will reveal that here in case others are wondering. Before I do, I will say that the associated app is pretty cool. It lets you draw out a track, lets you try it out, and then creates building instructions for it. I have tried to use the nomenclature found on the Ravensburger website in the following complete contents list: 18 gravispheres (steel balls - 9 silver, 3 red, 3 green, 3 blue) 8 base plates 2 transparent bases 2 small transparent bases 4 double balconies 16 balconies 2 long walls 2 medium walls 1 short wall 70 curve tiles 10 junction tiles (X) 2 3-in-1 tiles 4 Y-intersections/switch tiles 2 vortex tiles 16 base tiles - 8 are used for tunnels and 8 with other inserts - 2 straight tunnels - 4 curved tunnels - 2 Y-junction tunnels - 2 free-fall inserts - 4 catcher inserts - 2 splash inserts - 2 landing inserts 2 vertical u-turn tunnels 100 large height tiles 32 small height tiles 8 pillars 4 tunnel pillars 9 long rails 18 medium rails 27 short rails 3 curved rails (left) 3 curved rails (right) 2 dipped rails 2 drop rails 2 bent/Bernoulli rails with supports 2 long thin rails 2 long slow rails 2 finish lines 1 3-way starter 1 spinner 2 magnetic cannons 1 loop 1 scoop 1 hammer 1 vertical splitter (pro) 1 vertical mixer (pro) 1 helix (pro) 1 turntable (pro) I have only had it a few days, but it seems like a really good set to begin with, and there are still lots of other accessories that can be added. I already added spirals and trampolines, for example. Happy rolling!

### ⭐⭐⭐⭐⭐ Little engineer in training
*by T***A on October 23, 2023*

I purchased this 'toy' over a year ago for my 8yo grandson is gifted with high intellect and ADHD. He has always been curious about how things work. At our local museum they have a giant 9 foot high marble run that he is captivated by. He has the marble run that is a series of tubes and that's fine for younger children but Gravitrax is so superior. He is constantly changing his layout, adding and subtracting pieces, trying to "build a better mouse trap". My cousin, who's an engineer, and my grandson play with this for hours. It's hard to tell who's the adult and who's the child. It is so wonderful watch him. I have since purchased all but one of the expansion pieces sold on Amazon. My complaints are only 2. You cannot purchase the height tiles separately and the catapult expansion piece uses a rubber band. Really? I can see that zinging off to parts unknown or eventually breaking. This is such a great toy for those budding engineers. No wonder it was STEM's toy of the year. Thank you Gravitrax.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-04*