---
product_id: 287935665
title: "Thames & Kosmos Orbiting Solar System STEM Kit | Build a Rotating Solar System Model | Planets Revolve Using a Windup Motor | Explore Gear Ratios | Science Fairs | Difficulty Level: Intermediate Small"
brand: "thames & kosmos"
price: "€ 83.65"
currency: EUR
in_stock: true
category: "Thames & Kosmos"
url: https://www.desertcart.sk/products/287935665-thames-and-kosmos-orbiting-solar-system-stem-kit-build-rotating
store_origin: SK
region: Slovakia
---

# planetary gear mechanics 8 planets + Sun model windup motor, no batteries Thames & Kosmos Orbiting Solar System STEM Kit | Build a Rotating Solar System Model | Planets Revolve Using a Windup Motor | Explore Gear Ratios | Science Fairs | Difficulty Level: Intermediate Small

**Brand:** thames & kosmos
**Price:** € 83.65
**Availability:** ✅ In Stock

## Summary

> 🌌 Wind up your curiosity and orbit into STEM brilliance!

## Quick Answers

- **What is this?** Thames & Kosmos Orbiting Solar System STEM Kit | Build a Rotating Solar System Model | Planets Revolve Using a Windup Motor | Explore Gear Ratios | Science Fairs | Difficulty Level: Intermediate Small by thames & kosmos
- **How much does it cost?** € 83.65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/287935665-thames-and-kosmos-orbiting-solar-system-stem-kit-build-rotating)

## Best For

- thames & kosmos enthusiasts

## Why This Product

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

## Key Features

- • **Vibrant Realism:** Colorful, detailed planet graphics bring the solar system to life on your desk.
- • **Battery-Free Motion:** Wind it up and watch planets orbit naturally—no batteries, just pure mechanical magic.
- • **Hands-On STEM Mastery:** Build and operate a mechanical solar system with real gear ratios—perfect for curious minds.
- • **Ideal for Science Fairs:** Intermediate difficulty with step-by-step instructions makes it a standout educational project.
- • **Expandable for Discovery:** Includes a slot ready for the mysterious Planet Nine—stay ahead of cosmic discoveries.

## Overview

The Thames & Kosmos Orbiting Solar System STEM Kit lets you build a colorful, mechanical model of the solar system powered by a windup motor—no batteries needed. Featuring 8 planets and the sun, it demonstrates planetary gear mechanics and gear ratios, making it an engaging educational tool for ages 6 to 14+. With detailed planet graphics and a built-in expansion slot for potential new discoveries, this intermediate-level kit is perfect for science fairs and hands-on learning.

## Description

Set the planets in motion with a flick of your wrist! Build a mechanical model of the solar system including the sun and eight planets (also known as an orrery), wind it up, and watch the planets revolve around the sun. Assemble this complex machine using snap-together plastic parts to learn how the gears and wind-up mechanism work to spin the model. Detail each planet with colorful, realistic-looking printed planet graphics. Discover how a special type of gear called a planetary gear is used to simulate the mesmerizing motion of the solar system. Learn about the order of the planets, their relative sizes, their rates of revolution around the sun, their appearance, and other planetary facts. Bonus: There’s a built-in expansion slot in case the mysterious Planet Nine is discovered! This kit includes full-color step-by-step illustrated assembly instructions.

## Features

- Build a colorful, mechanical, rotating model of our solar system!
- The model uses a windup motor to set the planets in motion--no batteries required.
- Explore fundamental gear mechanics and discover a special type of gear called a planetary gear.
- Great for science fair projects, you'll learn about the planets' celestial orbits and tons of cool planetary facts.
- Includes a built-in expansion slot should the mysterious Planet Nine be discovered!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08TVY9TMD |
| Age Range Description | 6 - 14+ |
| Battery Description | Wind-up |
| Best Sellers Rank | #144,742 in Toys & Games ( See Top 100 in Toys & Games ) #45 in Solar Power Kits #1,275 in Educational Science Kits |
| Brand Name | Thames & Kosmos |
| Country of Publication | Taiwan |
| Customer Reviews | 4.2 out of 5 stars 250 Reviews |
| Educational Objective | STEM |
| Global Trade Identification Number | 00814743015685 |
| Included Components | Plastic building pieces, planet sticker sheet, suction cup, manual |
| Item Dimensions | 10 x 2.5 x 11 inches |
| Item Type Name | Solar System Modeling Kit |
| Item Weight | 2.08 ounces |
| Manufacturer | Thames & Kosmos |
| Manufacturer Part Number | 550037 |
| Manufacturer recommended age | 6 - 14 years |
| Material Type | Plastic |
| Model Number | 550037 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Set Name | Orbiting Solar System |
| Size | Small |
| Sub Brand | thames |
| Theme | Solar system |
| UPC | 814743015685 |
| Unit Count | 1 Count |

## Images

![Thames & Kosmos Orbiting Solar System STEM Kit | Build a Rotating Solar System Model | Planets Revolve Using a Windup Motor | Explore Gear Ratios | Science Fairs | Difficulty Level: Intermediate Small - Image 1](https://m.media-amazon.com/images/I/71YI5Y36prL.jpg)

## Questions & Answers

**Q: How does this move if it's not electronic?**
A: The model uses a wind-up gearbox and various other gears to spin the planets at varying rates.

## Frequently Bought Together

- Thames & Kosmos Orbiting Solar System STEM Kit | Build a Rotating Solar System Model | Planets Revolve Using a Windup Motor | Explore Gear Ratios | Science Fairs | Difficulty Level: Intermediate Small
- National Geographic Kids Space Encyclopedia, 2nd Edition: A Tour of Our Solar System and Beyond

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**Shop now:** [https://www.desertcart.sk/products/287935665-thames-and-kosmos-orbiting-solar-system-stem-kit-build-rotating](https://www.desertcart.sk/products/287935665-thames-and-kosmos-orbiting-solar-system-stem-kit-build-rotating)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-10-26*