Expansion Kit
Expansion Kit
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Independently reviewed & STEM.org Authenticated™ — and a Best in STEM award winner.
If they don't get hooked in the first hour, send it back. We'll refund every cent — no soldering required, no excuses asked.
Bundle with the Intro Kit
Snap together your first working circuit in five minutes flat.
How it works
Every electronic component (battery, LED, motor, switch, sensor) lives inside a standard brick-compatible block. Snap blocks together and the circuit closes; pull them apart and it opens. The bricks do the wiring. No breadboards, no jumper wires, no soldering iron, no smoke.
What's in the box
Ages & difficulty
Designed for ages 8 and up, with a sweet spot for curious 8–12 year olds. Word-free assembly diagrams mean younger builders can work independently; a 24-page written Learning Guide gives older builders the deeper "why" behind every circuit. Available in English, French, and Spanish.
LEGO compatibility
SparkBlocks click directly onto LEGO bricks and all major compatible brick brands. You can integrate our circuit blocks into your existing creations; no adapters or special baseplates required.
Why no soldering
Soldering is great for production circuits — and terrible for learning. When a connection won't work, learners need to see why. Because every component lives inside a block, a circuit either snaps together cleanly or it doesn't, and the failure point is right there in your hands.
Curious kids love SparkBlocks
"Screen Free Learning, compact and affordable"
We just got our Spark Blocks kit and just was so worth it. Our almost 7 year old was self motivated to start building the second he opened the box. no bribing required.
Sabrina · Perth, Australia
"I think we'll need to order more."
Our kids took turns building with them for well over an hour!
Ken L. Casa Grande Arizona
"A perfect family activity!"
The kit was easy to use, engaging, and I was floored at the diverse ways you could execute different designs. Even for a toddler, she was highly engaged in the building and circuit activation.
Laura B. · Vancouver, BC
Frequently asked
Do I need the Intro Kit first?
Question
What ages is it for?
SparkBlocks are designed for ages 8 and up, with a sweet spot around 8-12 years old.
Younger builders (5-7) usually need a parent alongside them, though the picture-only instructions mean no reading is required. Older kids and adults enjoy them too.
Is the battery safe? How is it charged?
Yes. The Power Block is a sealed, circuit-protected USB-C rechargeable unit — the same chemistry as a phone, with overcurrent and short-circuit protection built in. Charges with any USB-C cable.
Can my child break anything by connecting blocks incorrectly?
No. If blocks are connected the wrong way, the circuit simply won't work. Nothing gets damaged, and there's no safety risk.
SparkBlocks are designed for hands-on experimentation.
Do I need an app, computer, or Wi-Fi?
No. SparkBlocks are 100% screen-free. There's no WiFi, no Bluetooth, and no app required. Everything works right out of the box with a printed Learning Guide.
Are translated learning guides available?
Yes, we have some translations and are working on even more. English ships in the box; French, Spanish, and other Learning Guides are free downloads. Translated versions of the Assembly Instructions are also available on request.
How is it different from Snap Circuits?
Snap Circuits are great for following a set instruction book, but once you finish, there's not much else to build. SparkBlocks work with the LEGO-style bricks your kids already own, so the building never stops. Every block is also labeled with real engineering symbols, teaching actual circuit fundamentals.
Why does it cost more than other toys?
SparkBlocks aren't a typical STEM toy you use once and shelve. The Intro Kit includes real electronic components (rechargeable battery, motor, LEDs, speaker, switches) plus building bricks, with a printed Learning Guide, and instructions for 6 themed builds. This packs a lot of valuable education into one complete set.
Also, because every block works with the LEGO-style bricks your family already has, one kit powers unlimited creations. There's no instruction book to "finish" and nothing to throw away. Many families tell us their kids come back to SparkBlocks for months, which is rare for a STEM kit at any price!
Add-on Theme Kits
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Sold Out; Restocking Now!3-in-1 Mighty Machines Kit
Regular price $119.00 CADRegular price$119.00 CADSale price $119.00 CADSold Out; Restocking Now! -
Sold Out; Restocking Now!6-Legged Walking Ant
Regular price $93.00 CADRegular price$93.00 CADSale price $93.00 CADSold Out; Restocking Now! -
Patrol Car
Regular price $99.00 CADRegular price$99.00 CADSale price $99.00 CAD -
Fully Functional Fire Truck
Regular price $114.00 CADRegular price$114.00 CADSale price $114.00 CAD
- FHFrank H.Verified BuyerRated 3 out of 5 starsYesterdayGreat concept, Ok projects but very unreliable
The concept is great. The projects are ok. But the implementation is pretty poor. The main issue is that the electrical connection between blocks is very inconsistent. Even if you line brick up exactly and have a snug fit, it frequently fails to make an reliable electrical connection. And if you have a somewhat misaligned fit between blocks, then the electrical connection won't work at all. If your project doesn't work, you never know whether you built the circuit wrong or one of the pins&pads failed to make a good connection.
There are also a few of the pogo pins that fail altogether right out of the box. See pic below. The pogo pin on the right will not extend, even with a gentle pull with pliers. Several other pogo pins came similarly jammed, but were loosened with a gentle pull from the pliers.
I once did a large project with these pogo pins and gold plated pads. It worked wonderfully in the lab. But in the real world with dust particles, smudges on the pads and slightly misaligned mechanics, it was extremely unreliable and the project was a complete disaster.
SparkBlocks2 minutes agoFrank, thank you for the detailed feedback - and the photo. A spring pin that won’t extend properly is not normal, and we’d like to replace any parts showing that issue!
You’re also right that the electrical connection depends on good contact between the pins and pads. In normal use, the pins may sometimes benefit from being pressed/cycled a few times, especially when new, but they should not be jammed or unreliable out of the box.
I’m going to follow up by email so we can identify the affected pieces and get replacements sent. We appreciate the technical notes; this is exactly the kind of feedback that helps us improve the product.
- MBMat B.Verified ReviewerRated 5 out of 5 stars1 month agoVery Fun
I bought a few starter packs for my boys and the expansion for me. It's definitely a higher level skill. I'm only half-way through the book but I'm having a blast.
SparkBlocks1 month agoGreat to hear, Mat! The Expansion Kit definitely just opens the door to what's next - we'd love to see what you build with them.
- MMMario M.Verified ReviewerRated 5 out of 5 starsYesterdayA addition that really multiplies!
Bought this along with my intro packs and to be honest the expansion adds so many facets of use and is even enjoyable for me lol like me and the kids are playing side by side learning new things and new ways to build. It's awesome and the addition of will definitely make younger kids have the breadth to explore and challenge themselves!
SparkBlocks17 minutes agoThanks so much, Mario. We love hearing that the Expansion Kit opened up more ways for your family to build together. The added gearbox motors, remote, and circuit parts are meant to provide more room to experiment once builders get the basics down, so it’s great to hear your kids are already exploring and challenging themselves with it.
- MMikeVerified BuyerRated 5 out of 5 stars6 days agoSTEAM Club Favorite
Purchased this Expansion Kit along with the Intro Kit and so glad we did! Our STEAM Club students no sooner opened the Intro Kit and we needed to bust this open as well. They were so engaged with all of the components and figuring things out. They absolutely loved the Clean Up Bot, creating something that actually moved around, We also purchased the Walking Ant and let's just say there may or may not have been a small bot battle! It was so fun to see the students interacting with the kits and results like they did, and it even led to discussions of how to tweak and improve the bots for battle. As with the Intro Kit, my only regret is that we only purchased a single Expansion Kit, not knowing how engaged the students would actually get!
SparkBlocks10 minutes agoThanks, Mike - this is fantastic to hear. A STEAM Club win is about as good as it gets! And I love the idea of bio-mech-ANT vs the clean up bot! Sounds like your students went straight to the experimentation (rather than the Learning Guide). Really appreciate you sharing how engaged they were - and yes, having more than one kit in a club setting definitely helps once the ideas start multiplying.
- SSaulVerified ReviewerRated 5 out of 5 stars1 month agoEnjoyable connecting time with my daughter
Bought this kit for my daughter and she’s been super into it. It’s awesome to see how curious she is. The instructions are easy to follow and she’s so satisfied to see the projects work. It’s been quite enjoyable to connect, learn and discover together. Looking forward to our next build session.
SparkBlocks1 month agoLove to hear this, Saul! One of our goals with SparkBlocks was to create opportunities for exactly these kinds of shared experiences. Seeing curiosity turn into satisfaction/confidence is so powerful! Thanks for building with us! ⚡
