K’NEX Sets: Best Sellers

Best seller K'nex sets from Amazon

For decades now, K’NEX toys have captured the imaginations of children and adults who love to keep their inner child. K’NEX product line has building sets specially designed for every age group and skill level. That means every K’NEX or building toy enthusiast finds their favorites with comprehensive product ranges, whether it’s for special features of K’NEX sets, complexity, designs, or age appropriateness. 

On this page, we hand-picked K’NEX best sellers based on Amazon.com. The ultimate building experience comes from rediscovering your favorite kit. Get your hands on best-selling sets, from Beginning 40 Model Building set to 100 Model Imagine Building, STEM explorationssets, and KID K’NEX, tested and loved by majority of K’NEX enthusiasts, including us.

1. K’NEX 35 Model Building Set, 480 Pieces

K’NEX offers and allows young builders to construct a wide range of models that can move, unlike other building toys. K’NEX 35 Model Building set holds high value as an academic toy, as it helps children understand STEM subjects, and encourages hands-on learning. So, teachers looking to engage the minds of a class with an exciting activity, this set is for you. 

With its 480 interlock pieces, this set is perfect for kids 7 years and up to create up to 35 models. With unique designs and various 35 model selections, the set is a gateway to imagination and will keep kids busy for hours. Not only children but kids in a heart!

 

Key features:

  • The kit teaches children the key concepts of design and engineering, and they’ll enjoy the combination of learning and play.


  • 480 snap-fit pieces can easily be assembled and reassembled into various models including animals, trucks, airplanes, and helicopters.

  • Kids can develop their artistic skills by creating shapes, figures, and models using the rods and connectors.

  • Enhances the development of children in key areas, such as hand-eye coordination, fine motor skills, problem-solving skills, and spatial awareness

  • Perfect for academic settings as it aligns with the curriculum and helps children understand STEM subjects. This set

  • Comes with a storage tub to keep all K’NEX parts in one place. Tis handy treasure chest is great for storing precious pieces that kids love to open.

  • Step-by-step instructions show builders how to construct 35 unique models.

  • Suitable for ages 7 and up, allowing them to can experiment with different features and make their own designs

  • Perfect gift for children who will enjoy endless fun as they put their minds to the challenge and engage in the hands-on learning experience.

2. K’NEX Imaginative Building Set 70 Model - 705 Pieces

Build a world of models with K’NEX 70! A box contains 705 exciting plastic rods and connectors that can be assembled into anything you can imagine – from cars to planes to sea creatures. A 70-page instructional booklet provides detailed instructions for building amazing creations.


The kit is the perfect combination of learning and play.  Providing endless building possibilities and hours of entertainment, this set engages children’s minds and teaches them fundamental engineering and construction skills.

A portable suitcase box comes with the K’NEX 70 Model Building Set.

 

Key features:

  • 705 classic K’NEX pieces,  from rods and connectors to wheels and specialized parts 
  • Up to 70 different builds
  • Comes in a treasure chest-style package to store all K’NEX parts
  • Easy-to-follow instruction manual. 
  • Suitable for kids 7 and up.
  • STEAMagination – It’s the connection of STEAM (science, technology, engineering, arts, and math) with a child’s curiosity and creativity.

3. K’NEX Beginner 40 Model Building Set 141 Pieces

40 model beginner set is ideal for 5-year-olds and up who seek a creative outlet. With this set, you get 141 pieces and instructions for 40 different models, all broken down into easy-to-follow steps.

 

This kit is the perfect introduction to the construction and design world for beginner builders interested in the construction and design world. Learn fundamental concepts of engineering and the principles used to create each model.

 

The models in the sets click together easily to build. With these new construction parts, budding engineers can build on a flat 2D surface, then layer the flat builds together to create an awesome 3D structure, including a car, a skyscraper, an airplane, a rowboat, and so much more! In addition, new wheels snap right on – they’ll be on the move in no time!

 

Key features:

  • All new easy-to-build 141 parts
  • Children will develop a wide range of skills, like fine motor skills, problem-solving and hand-eye coordination. 
  • Promotes cognitive development in a fun way, and children will gain an understanding of STEM subjects  
  • Step-by-step manual to help bring your imagination to life! 
  • Suited for children aged 5 +

4. KID K’NEX Build A Bunch Set – 66 Pieces

Build 30 different fun and friendly creatures from 66 colorful pieces. The set contains soft, colorful, and chunky rods and connectors that easily stack, snap and plug together. This set also contains fun and unique parts such as wheels, eyes, and tails, perfect for young minds and little hands from the age of 3. 

 

Experience hours of building and playing fun and turn 30 building ideas into an airplane, a train, bugs, animals, and underwater creatures. KID K’NEX set supports key areas of a preschooler’s development. It strengthens hand-eye coordination, fine motor skills, problem-solving skills, spatial awareness, and imagination as kids click the different parts together and discover how the building system works!

 

Key Features:

  • 66 brightly colored parts to create 30 different designs
  • Pieces are sturdy and click together easily, so kids can quickly learn to build and create.
  • A poster-sized sheet is included for the 30 building ideas 
  • Perfect set for sparking child’s interest in building and designing
  • Recommended for kids aged 3 and up

5. K’NEX 100 Model Imagine Building Set - 863 Pieces

Create your own model using the included instructions, or build one from scratch! K’NEX 100 Model Imagine Building set is an exciting journey for anyone looking to advance their construction and design skills. 


Regardless of your age and skill, let your imagination run wild with the 100 Model Imagine Building Set! Featuring 863 pieces, makes it one of the biggest K’NEX sets available today. With 100 models to build and rebuild, this kit has something to offer for everyone!


An easy-to-store suitcase storage box comes with this set. One model can be built at a time, including rolling cars, working amusement park rides, or a transforming animal. Ideal for kids aged 7 and up, budding builders have an endless amount of creative freedom to explore their imaginations.

Key Features:

  • 863 classic pieces that can be attached to one another in different ways to create shapes, figures, and structures with ease.
  • The snap-fit pieces stick together securely and can be easily reassembled into other creations.
  • Includes an instructional booklet, which shows builders how to create 100 unique models with its helpful illustrations. 
  • Connection of STEAM (science, technology, engineering, arts & math) with a child’s natural curiosity and creativity
  •  Ideal for children aged 7+ and up

6. K’NEX Education STEM Explorations: 3-in-1 Classic Amusement Park Building Set - 744 pieces

Build replica models of the actual attractions, a Ferris wheel, a boom ride, and an exciting swing ride from the K’NEX 3-in-1 Amusement Park set, and get hands-on building experience. 

This building set contains 744 classic parts and pieces, including rods and connectors, to create 3 different amusement park rides, one at a time. The durable plastic pieces are easy to connect and assemble. An electric motor powers KNEX rods and pieces to create a model using this building system. Just like in an amusement park, each ride rotates or spins!

Explore the fascinating world of engineering. This creative set is a fun and innovative approach to developing a child’s learning and enhancing imagination.

Key Features:

  • 744 durable, colorful plastic classic K’NEX pieces
  •  Allows to create 3 different models
  • Included battery-powered motor gives life to the KNEX pieces. Requires 2 AA batteries, not included.
  • The set comes with an easy-to-follow instruction manual.
  • Develops child’s hand-eye coordination, spatial awareness, and problem-solving skills
  • Ideal for kids 9 and up.

7. KID K’NEX Budding Builders Building Set - 100 pieces

Budding Builders Building Set contains 100 classic K’NEX pieces, in vibrant colors and with premium-quality construction. It features colorful eyes, curly tails, flappy ears, big feet, bendable joints, and spinning propellers that kids can use to create a whimsical interpretation of their favorite animal! With a long-lasting, premium plastic tub, it is easy to pack away.

Give your builders the freedom to design their own basic figures, and guide them in constructing complex structures that will ignite their curiosity.  For kids over 3 years old K’NEX Budding Builder Building set is a great tool for promoting independent play. Kids can experiment and express themselves with new different designs to spend hours on end while developing important skills. 

 

Key Features:

  • 100 Kid K’NEX pieces
  • 50 building ideas to create different KID K’NEX designs
  • Sturdy reusable plastic storage tub
  • Suitable for children aged 3 years +

If you are looking for a new idea or inspiration for your next immersive building journey, check out our blog section and choose favorite top sets from popular K’NEX building sets. Explore its features, themes, and complexity that suits your preferences and needs. Discover some best deals at competitive rates that you can buy on Amazon.com today.