Vendor: Contixo Inc
Availability: 50 left in stock

About this item

  • ADVANCED SET OF 223 PCS TOTAL: Package includes 223 pieces, no pure plastic piece. Refill your existing pieces or even building other brand to expand model opinions. More pieces,...

Contixo ST3 Mega Mechanic 3D Building Block Set - 223 PCS
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About this item

  • ADVANCED SET OF 223 PCS TOTAL: Package includes 223 pieces, no pure plastic piece. Refill your existing pieces or even building other brand to expand model opinions. More pieces, more possibilities.
  • SAFE PLAY STEM TOYS: Well made with toxin-free materials and rounded-edge design. The Contixo ST3 building blocks are safe for kids to play with and suitable for multiple age groups of different learning needs. Kids under 3 years need to be supervised to avoid choking hazards and parents need to be more involved in helping the toddlers to build magnetic shapes and structures.
  • LEARNING WITH THE FUN: Attractive rainbow building block set is designed as educational toys to help build kid's sense of creativity and get better understanding of color, geometrical shapes and develop motor skills and creative thinking. Great for special reasoning, architecture, STEM and STEAM.
  • PERFECT BOREDOM BUSTERS & MEMORY MAKERS: Keep these building block tiles in your special boredom buster cabinet. Every time your toddler say “I'm bored”, take them out and then he/she will pick an STEM activity to do for hours. We highly recommend parent-to-kid bonding play on weekends. Best gift for holidays.
  • CREATIVITY BEYOND IMAGINATION: ST3 building blocks Playboards for preschool, pretend play and more. Easy to construct and easy to put away for storage.

Contixo ST3 building toys is STEM learning Toys. Educational construction building blocks toys set best birthdays toy gifts for kids.

Contixo ST3 building blocks (COMES WITH 223 PIECES) help foster brain development and creative thinking by giving kids and teens constructive ways to express themselves. Encourage creative thinking and help kids learn how to solve complex problems as they play. Learning to approach problems in a creative way is a skill that kids can use throughout their lives. Using this building sets to enhance these skills allows kids to grow in a way that is fun and enriching.

At last, it is very important that we don't forget to celebrate every day when your child creates something or succeeds at something new, even a small task!


Building blocks kit has so many parts, children need to use their imagination to assemble them, which could rapidly improve their hand-eye coordination and manipulative ability and train their logical thinking and problem solving-ability.


This ST3 building blocks is the best gift for kids. Unleash your kids' creativity and encourage them to build anything they put their minds to. Playing with family or friends indoor and outdoor.


We give you 90% more blocks, more wrenches, more movable wheels, more plates, and more nuts & bolts than any other set. We give you enough tools for 8 kids to build at the same time.


Contixo ST3 building blocks have bright color. It develops children’s visual discrimination towards colors. kids can build dinosaur, helicopter, big robot, elephant, and other funny models, allowing them to grow in a way that is fun and enriching.


Our bolts are custom designed with a built-in screwdriver slot so your kids can use either the wrench or the screwdriver to build the pieces for their toys. Uses 2 AA Batteries (not included).


We have more tools than other sets: 4 dual-purpose “clicking” wrenches, a kid-friendly screwdriver & a special combination wrench so more of your kids can play at the same time.


Kids building blocks come with strong storage bag and it is keeping the toys clean and tidy. It is perfect size to be carried by parents with kids for camping, school, small party, and other activities.


Building blocks are made of ABS material with high security level. Non-toxic, safe, and tasteless, colorful, and durable, which will be a best gift for kids.


This building toys set covers many blocks nuts & bolts, wheels. It can be combined into many patterns, animals, cars, robots, and anything they can imagine! Develop kids' imagination, creativity, motor skills, social skills, and mind.


User Manual

100% Satisfaction Guarantee
We stand behind everything we sell. In most cases, if you are not satisfied with your purchase, you will be eligible for a replacement or refund within 30 days of purchase. Any returns for refund will have a minimum 10% Restocking Fee applied. The Restocking Fee covers all the Shipping and Handling costs during the original order process.
Our Guarantee does not cover any damage that may be caused by improper use or accidents. If you believe your unit has or contains a manufacturing defect, you can have the unit returned it for inspection pending repair or replacement within 30 days of the initial purchase date.

For items Dead on Arrival (DOA) or items that have arrived damaged in Returns, you must submit a Return Request through us directly within 48 hours of receiving the unit(s). Please contact the shipping carrier you have chosen, and file a corresponding lost, damaged, or stolen claim, or simply reject the delivery when it arrives. We don't accept any rejected returns over the allotted 48 Hours unless if you provide the proof that this is not your remorse.

We reserved the right to test "Dead on Arrival" returns. A service fee of up to 20 percent of the total sales price may be imposed if the unit is not deemed “DOA/DEFECTIVE” after RMA inspection. The service fee excludes any external shipping fees if the customer misrepresents the condition of the product. Any returned items that have been damaged through misuse, has been used, is missing parts, or is otherwise in any type unsellable condition will result in the customer being charged up to 50 percent restocking fee based on the condition of the product.


Returning or Exchanging Items
The policy on RETURNS OR EXCHANGES states that you will need to self-ship any units for returns or exchanges personally.
You must have a proof of purchase (store receipt, gift receipt, shipping invoice, or member purchase history) for all returns and exchanges.

Items must be in original condition and packing for a return or exchange. If you send merchandise that is unsanitary, hazardous, incomplete, or otherwise, to Contixo Returns Department, it may be rejected and returned at your expense.
We will not accept returns of any items 30 days past the initial date of purchase.


Returns and Exchanges by Mail
If you return or exchange a product by mail, we recommend that you ship your package with a carrier that can provide tracking and insurance. Contixo is not responsible for any packages lost in transit without proof of tracking.
If a customer returns merchandise that does not meet conditions of the 100% Satisfaction Guarantee, it will be sent back to the customer at their expense.br> />You must return the items within seven business days of receiving your RMA requests (Return Merchandise Authorization) being issued to you.

It might takes 3-7 business days for the RMA team to process, inspect, repair or replace/refund, when the unit has been received in returns. All shipping fees are non-refundable.

The refund will be credited to your Amazon account, Amazon will credit it to your bank or credit card that you used. We are not able to control of that between your Amazon account and bank accounts.

All returns must have the Order Number and the reasons for return. If the required information is not included, Contixo’s Returns Department may be unable to recognize and process your return in time.

After the orders have been shipped, we are unable to control the shipment, cancel the orders or change the address. It is buyer's responsibility to provide the correct shipping address and receive them when arrived. If the order delivery is refused, the order bill won't be refunded.
International buyers will be required to pay the import duties & taxes at their own costs.

Thank you very much again for Shopping with Us.


Customer Reviews

Based on 34 reviews
Martha Jhenifer Vallejos Salazar
Fantastic, very useful.

This is great, it helps a lot to get my little one distracted and at the same time learn... it gets angry when he can't get something but this helps him to calm down and learns to have patience and helps a lot to explore his creativity.

Lucille W.
The Perfect Gift

I am happy with this product. My kiddos love them. Good quality!

Noah S.
Perfect Building Set

I used these for years in my kindergarten class. Kids played with them everyday and never got tired of them. Durable.

Rowan K.
Nurturing Creativity

My great grandsons LOVE these tiles, play with them for hours. Quality product.

C. Hannah
Awesome toy

Great gift for toddlers.

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