We're Kontu (pronounced kahn’–too), a new eco-friendly toy company based in Boulder, Colorado. In August 2019, we launched our first product, STEM Blocks, a magnetic wooden resource for playfully engaging young children in mathematics and STEM.

Today, STEM Blocks are distributed world-wide in eight countries and have won the coveted Parents' Choice Gold Award for 2020 and is a STEM.org Authenticated™ Educational Product. We are very excited to connect with you at ASTRA Winter Camp! Read more about our story, product and specials below.

Visit our huddle on Monday, Feb 22nd from 12:40 – 12:55 pm CST. We'd love to meet you and answer any questions you have.

See you at camp. ❄️⛺️


Monday, February 22 • 12:40 – 12:55 pm CST


We've extended office hours! We'd LOVE to meet you and answer any questions you may have. Click the button below and select your preferred time.

Mar 1st - 3rd




Kontu is proud to be represented by Toyology. We are looking for representation in other territories. Please get in touch, we'd love to speak with you!


Hi, I'm Patrick Greenwood, founder of Kontu and inventor of STEM Blocks. I was inspired to create our product after becoming a father and not finding an early-math resource for my daughter that also aligned with our care for the planet. I'm so glad I did! Today, families all over the world are big fans of our product.

We are a family-run business and very grateful to have been so warmly welcomed into the ASTRA community. As a proud member of ASTRA, we look forward to partnering with ASTRA Retailers and are 100% committed to YOUR success.


As an independent toy retailer, I am always on the hunt for the next new fantastic toy -- and Kontu Magnetic STEM Blocks are my latest find! These blocks fit the very definition of an open-ended toy with high play value; they are also beautiful, tactile and in packaging that helps to tell their story. But even better than the blocks is the active and involved inventor behind their creation: Patrick Greenwood. Patrick is a toy retailer's dream: from helping me learn the toy & how best to sell it to providing retailer support in the ways that work best for my store (from curated social media posts and engaging videos to joining me on a FB live event with my customers which made them feel like toy insiders!!). As independent toy retailers, we want our customers to know us as toy experts with access to the very best toys that will help kids learn and grow -- Kontu Blocks combined with Patrick's support position me as that expert.

Amy Saldanha

Founder & CEO of kiddywampus

Kontu Magnetic STEM Blocks – a great all-new concept for combining a math manipulative with a beautiful plaything! And kids can't put it down, once they start playing... and learning!

Brian Miller

President of Geppetto's

I gave Kontu Magnetic STEM Blocks to my three year old grandson. He and his mom love them! Every time they take them out they discover new ways to play and learn. They are perfect for his imaginative play at three years old and I can see them growing with his development over years to come.

Anita Demetropoulos

Toy Business Consultant


Magnetic STEM Blocks

You've NEVER seen magnetic wooden blocks like these before!

(Swipe or click for more images)

STEM Blocks are an award-winning eco-friendly magnetic wooden resource for playfully engaging young children in mathematics and STEM.

Suitable for children ages 3 to 8 years old.

Made from sustainably-grown rubber tree wood, STEM Blocks are all-natural and good for the planet. The wood is a reclaimed waste resource milled from rubber trees that have stopped producing latex. New trees are immediately planted in their place!

STEM Blocks, along with the accompanying number and activity cards, promote critical-thinking and discovery. Designed for tots as young as three, these playful blocks invite youngsters to explore magnetism, early mathematics, weight & counterbalance, joints & hinges, and construction. Activity cards nudge children to explore concepts through play. It’s the perfect toy to jumpstart their road to math positivity!

All kits include 8 two-sided activity cards, 18 number cards, and a wooden card stand.

Play Demo

Three Kit Sizes

Super Mega Awesome!


$99.99 MAP

Let's Go Bigger


$69.99 MAP

Hello Kontu


$49.99 MAP

✤ Camp Specials ✤

Extended to March 15th (But we hope you order sooner!)

Orders ship immediately. Pay the invoice upon receipt and receive bonus benefits such as free FFA shipping, discounts, LIVE Facebook events for your store, and more!

We actively promote all of our Retailers through announcements on social media and a 'Where to Buy' map on our website. We frequently send customers to our retail partners' websites to make a purchase.

Click one of the ORDER NOW buttons below to select your package and place an order. On the form, you may enter your Sales Rep company and your Rep's name and they will get credit.


Pre-Pay Benefits

  • 5% Discount
  • FFA Free Freight (Contiguous US)
  • Facebook Live Demo!
  • Organic Fair-trade Cotton Tote

Standard Benefits

  • Free Demo K25 Kit
  • Net 30 Terms
  • $40 Freight Cap
Item NamePriceQuantity
K10 Kit$256
K15 Kit$359
K25 Kit$5012


Reg. $1,065


If applicable, please order with your Toyology Rep


Pre-Pay Benefits

  • FFA Free Freight (Contiguous US)

Standard Benefits

  • Net 30 Terms
  • $30 Freight Cap
Item NamePriceQuantity
K10 Kit$256
K15 Kit$356
K25 Kit$506



If applicable, please order with your Toyology Rep


Pre-Pay Benefits

  • $20 Freight Cap

Standard Benefits

  • Net 30 Terms
Item NamePriceQuantity
K10 Kit$256
K15 Kit$353
K25 Kit$503



If applicable, please order with your Toyology Rep