---
product_id: 616175950
title: "Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003"
brand: "melissa & doug"
price: "$54.35"
currency: USD
in_stock: true
reviews_count: 6
category: "Melissa & Doug"
url: https://www.desertcart.us/products/616175950-melissa-and-doug-underwater-wooden-gear-puzzle-18-piece-interlocking
store_origin: US
region: United States of America
---

# Vibrant ocean-themed artwork Chunky pieces for fine motor skills 18 interlocking wooden gears Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003

**Brand:** melissa & doug
**Price:** $54.35
**Availability:** ✅ In Stock

## Summary

> ⚙️🌊 Turn playtime into a STEM adventure beneath the waves!

## Quick Answers

- **What is this?** Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003 by melissa & doug
- **How much does it cost?** $54.35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/616175950-melissa-and-doug-underwater-wooden-gear-puzzle-18-piece-interlocking)

## Best For

- melissa & doug enthusiasts

## Why This Product

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

## Key Features

- • **Built for little hands:** Chunky, easy-grip wooden pieces develop fine motor skills and hand-eye coordination effortlessly.
- • **Durable & travel-ready:** Sturdy wooden base and removable gears make cleanup and on-the-go learning a breeze.
- • **Spin into STEM mastery:** 18 precision-cut gears teach mechanical motion and cause-effect in a hands-on, playful way.
- • **Dive into colorful learning:** Bright underwater creatures spark imagination while reinforcing spatial reasoning and problem-solving.
- • **Screen-free, brain-boosting fun:** Encourages critical thinking and creativity without digital distractions—perfect for mindful playtime.

## Overview

The Melissa & Doug Underwater Wooden Gear Puzzle is an 18-piece, screen-free STEM toy designed for preschoolers. Featuring colorful ocean-themed wooden gears that interlock and spin, it promotes fine motor skills, cause-and-effect understanding, and early engineering concepts. Durable and easy to handle, this puzzle offers engaging, imaginative play that builds critical thinking and spatial reasoning in young learners.

## Description

Make learning mechanical motion fun with the Melissa & Doug Underwater Wooden Gear Puzzle. This 18-piece gear puzzle lets kids explore how gears work together while enjoying a vibrant undersea theme. By turning one gear, children can watch the connected pieces rotate, reinforcing cause-and-effect learning in a playful way. With its chunky wooden design and colorful graphics of ocean animals, it’s perfect for developing fine motor skills, problem-solving, and early STEM concepts. The gear pieces are easy for little hands to handle, encouraging hands-on interaction and critical thinking. This engaging toy is great for both solo and parent-assisted play. Built to last, it comes with a durable wooden base and gear pieces that store easily. Ideal for preschoolers, this puzzle helps build a foundation for future learning—one spin at a time. Item code: MD31003

Review: يحتوي على صوت كواليتي عال
Review: What an amazing puzzle. Every piece of the animals has a beautiful picture on it. I have two grandsons aged two who had no difficulty with this puzzle at all. They were able to easily grip the pieces and place them in the proper spots. The puzzle piece is put in the slot and then you get the animal sound. Every animal's sound is perfect. The babies enjoy the dog and cat the most as they identify with them more than the other animals. This puzzle is strongly built and made of good quality wood. I have not needed to replace any batteries and the kids have played with it for hours on end. The only downfall is if you are missing a piece, when you turn on a light, the animal who is missing sound plays. We listened to the hamster sound for 6 months every time we turned on the lights. We finally found it. Melissa & Doug products are top quality and I would recommend this puzzle to anyone with little ones. It is a fabulous learning tool.

## Features

- 🐠 18-piece wooden gear puzzle featuring colorful underwater creatures and interlocking gears—designed to help kids understand mechanical motion and cause-and-effect through hands-on play.
- 🧠 Encourages STEM-based learning and builds problem-solving, concentration, and spatial reasoning skills as children align gears to spin together in a visually engaging aquatic setting.
- 👐 Designed for little hands, with chunky wooden pieces that are easy to grasp and turn—perfect for developing fine motor skills and hand-eye coordination in preschool-aged kids.
- 🎨 Bright ocean-themed graphics and friendly sea creatures spark imaginative play while introducing mechanical concepts in a fun, accessible way that feels like play, not learning.
- 🎁 A great educational gift for kids ages 3+, offering screen-free fun that promotes critical thinking, creativity, and early engineering exploration through rotating gear play.
- 📦 Includes sturdy wooden puzzle board and removable gear pieces for easy cleanup and storage—ideal for playrooms, classrooms, or travel-friendly educational entertainment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BW29JHZB |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #37,542 in Toys ( See Top 100 in Toys ) #31 in Toy Interlocking Gear Sets #1,349 in Puzzles |
| Color | multicoloured |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,977) |
| Date First Available | 1 August 2023 |
| Educational Objective(s) | Color Recognition, Concentration Skill, Concentration ability, Sorting Skill, hand eye coordiantion |
| Item model number | MND31003 |
| Language | Unqualified |
| Manufacturer recommended age | 36 months - 10 years |
| Material Type(s) | Wood |
| Number of Game Players | 1 |
| Number of Puzzle Pieces | 1 |
| Product Dimensions | 4.45 x 20.65 x 28.27 cm; 318 g |
| Release date | 15 July 2023 |
| tech_spec_battery_description_toys | No batteries required |

## Product Details

- **Brand:** Melissa & Doug
- **Manufacturer Minimum Age (MONTHS):** 36.0
- **Number of pieces:** 1
- **Product dimensions:** 44L x 207W millimeters
- **Puzzle type:** Jigsaw

## Images

![Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003 - Image 1](https://m.media-amazon.com/images/I/7169j7s57JL.jpg)
![Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003 - Image 2](https://m.media-amazon.com/images/I/71it+jeGTIL.jpg)
![Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003 - Image 3](https://m.media-amazon.com/images/I/71p9IMIHEWL.jpg)
![Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003 - Image 4](https://m.media-amazon.com/images/I/71qS5+iUS2L.jpg)
![Melissa & Doug Underwater Wooden Gear Puzzle – 18-Piece Interlocking Gears with Colorful Ocean Artwork – STEM Learning Toy for Preschoolers – Fine Motor & Cause-&-Effect Play | MD31003 - Image 5](https://m.media-amazon.com/images/I/81FUl3bHNLL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by H***M on 25 September 2025*

يحتوي على صوت كواليتي عال

### ⭐⭐⭐⭐⭐ Review
*by C***R on 10 November 2016*

What an amazing puzzle. Every piece of the animals has a beautiful picture on it. I have two grandsons aged two who had no difficulty with this puzzle at all. They were able to easily grip the pieces and place them in the proper spots. The puzzle piece is put in the slot and then you get the animal sound. Every animal's sound is perfect. The babies enjoy the dog and cat the most as they identify with them more than the other animals. This puzzle is strongly built and made of good quality wood. I have not needed to replace any batteries and the kids have played with it for hours on end. The only downfall is if you are missing a piece, when you turn on a light, the animal who is missing sound plays. We listened to the hamster sound for 6 months every time we turned on the lights. We finally found it. Melissa & Doug products are top quality and I would recommend this puzzle to anyone with little ones. It is a fabulous learning tool.

### ⭐⭐⭐⭐⭐ Review
*by T***I on 6 January 2026*

My 1 year old loves this!! It's great quality and plays the whole song.

## Frequently Bought Together

- Melissa & Doug Wooden Underwater Jigsaw Spinning Gear Puzzle – 18 Pieces Wooden Puzzle for Toddlers and Preschoolers, for Boys and Girls Ages 3+
- Melissa & Doug Safari Wooden Chunky Puzzle - 8 Pieces - FSC Certified
- Melissa & Doug Farm Wooden Cube Puzzle With Storage Tray - 6 Puzzles in 1 (16 pcs) - FSC Certified

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-16*