Name: Mechanical Building Blocks STEM Toy Set
Brand: Krafia
Price: 41.99 USD
Availability: InStock

$41.99

In stock
Free shipping in the US
30-day money back
Secure checkout

{"id":67984124346499,"title":"3-Pack \/ Bow","option1":"3-Pack","option2":"Bow","option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":{"id":49030440583299,"product_id":15465238364291,"position":5,"created_at":"2026-10-21T03:46:44-05:00","updated_at":"2026-10-21T03:46:44-05:00","alt":null,"width":1254,"height":1254,"src":"\/\/www.krafia.com\/cdn\/shop\/files\/draaiknal-5.png?v=1792572404","variant_ids":[67984124346499]},"available":true,"name":"Mechanical Building Blocks STEM Toy Set - 3-Pack \/ Bow","public_title":"3-Pack \/ Bow","options":["3-Pack","Bow"],"price":4199,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":null,"id":46697481666691,"position":5,"preview_image":{"aspect_ratio":1.0,"height":1254,"width":1254,"src":"\/\/www.krafia.com\/cdn\/shop\/files\/draaiknal-5.png?v=1792572404"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

GOOD TO KNOW:Free standard shipping on every US order. Every shipment comes with tracking, and you have 30 days to return it if it is not right.

Build It, Then Watch How It Works

This mechanical building blocks STEM toy lets older kids and teens discover how gears, levers and moving parts work by building them by hand. A collection of small pieces gradually turns into a working creation, which makes the project feel like an adventure.

Discover How Mechanics Work

Go beyond ordinary building blocks and see how individual parts work together to create movement. Visible gears, levers and rubber band powered mechanics turn technical ideas into something builders can assemble and watch in action. Each step invites curiosity about mechanical design.

Screen-Free Building Together

Swap passive screen time for a project that keeps hands and minds busy. Older kids and teens can take it on independently, while younger builders may enjoy assembling the smaller pieces together with an adult. It is a chance to solve problems and build side by side.

Why You'll Love It

Hands-On Learning | Building the mechanism shows how gears and levers work.
Working Action | The finished model moves, which makes the effort rewarding.
Screen-Free Focus | A project that keeps hands and minds engaged.
Build Together | A good activity for parents and kids to enjoy side by side.
Several Styles | Choose from bow, crossbow and revolver designs.

Product Details

Product type: Mechanical building blocks STEM toy
Styles: Bow, Crossbow, Revolver
Set options: 3-Pack, 12-Pack with all styles
Mechanics: Gear mechanism, rubber band power, lever mechanics
Includes: Electronic manual

A project that turns curiosity into something kids can build, test and be proud of.

At Krafia, we strive to make your delivery experience fast, secure, and fully transparent. Every order is handled with the utmost care, and best of all—standard shipping is always free within the United States.

Track Your Package
Your order will be delivered by our trusted carriers. To keep you in full control, we provide a Track & Trace number with every shipment, allowing you to follow your package from our warehouse to your doorstep.

Delivery Estimates & Times:
For complete details on processing times and estimated delivery dates, please click the button below:

View Shipping Details

At Krafia, we want you to love every purchase. If a product doesn’t meet your expectations, we’ve designed our return process to be as simple and transparent as possible.

30-Day Easy Returns
We offer a 30-day hassle-free return period with no unnecessary paperwork. Our customer support team is always here to assist you through every step of the process.

Need to make a return?
Detailed instructions on how to ship your return, information on refund processing times, and a list of eligible items can be found below:

View Return & Refund Policy

Have questions about our collection, need assistance with your order, or simply want to share your feedback? We’re here for you! The Krafia team is dedicated to providing support at every step of your shopping journey.

Dedicated Support
Contact us at any time—we typically respond within 24 hours on business days. Your satisfaction and shopping experience are our top priorities.

Ready to reach out?
Click the button below to fill out our contact form or find our direct contact details:

Contact Us

More for little ones

Shop more kids and toy ideas

Baby & Toddler

Montessori & Learning

Outdoor Play

Arts & Crafts

Free Shipping

Enjoy free shipping on all orders across the United States. No hidden fees, just simple and convenient delivery straight to your door.

30-Day Easy Returns

Not exactly what you expected? No problem. You have 30 days to return your items for a stress-free experience.

Secure Payments

Shop with confidence. Your transactions are protected by industry-leading SSL encryption technology, ensuring your data stays safe and private.