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Knex

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Items 1 - 30 of 61
  • Item #: 023925
    Retail: $105.00
    Rainbow Price: $94.95

    For the ultimate in group building, this massive set offers 1200 K'Nex pieces, including K'Nex bricks! 20 model ideas are included on three building idea sheets, and kids can build at least three models at a time with the amount of bricks included. The set is packaged in a durable storage container with a snap-on lid so all those pieces have a home!

  • Item #: 008110
    Retail: $24.99
    Rainbow Price: $21.50

    Put your K'NEX creations into action with this motor pack set. Students will learn about speed, force, and gearing systems as they study their newly motorized models. Set includes two motors, but not the AA batteries to power them. ~ Megan

  • Item #: 060201
    Retail: $199.99
    Rainbow Price: $149.95

    Enjoy the best of the K’Nex solar, wind and water energy sets with this kit. It features nine different models including a windmill, sail car, wind-powered water lift, hydroelectric generator, hydro car, grist mill, a solar car, a man cranking a wheel and a shuttle ride. The assembly instructions will show you how to build the models while the teacher guide will help you use the finished designs as a part of a lesson. Great for researching renewable energy and really great way to incorporate kinesthetic learning! – Laura

  • Item #: 004476
    Retail: $49.99
    Rainbow Price: $39.95
    Standing at three and a half feet tall, this motorized K'Nex contraption is as close to the real thing as you can get. Once everything is assembled, the cart will run without stopping, as the motorized portion lifts it back to the top to start over again. With loops, tight turns, and steep drops, this kit will be fun to build and rebuild. The usual K'Nex simplicity makes construction easy. ~ Mark
  • Item #: 063463
    Retail: $19.99
    Rainbow Price: $18.75
  • Item #: 063461
    Retail: $24.99
    Rainbow Price: $23.50
    Go supersonic with this awesome building set! Create a land rocket from 275 pieces, then head to the K'Nex website where you can find bonus directions for a Mach Speed Car. – Laura
  • Item #: 060202
    Retail: $15.99
    Rainbow Price: $14.50
    I've always loved building sets, and these are no exception. Each of these kits (three assorted styles) contains 156-163 pieces, each of which includes a battery-powered motor (2 AA batteries required, not included), so parts of the finished build will move. The Robo Sting has wings that flap, the Robo Smash has arms that move up and down, and the Robo Strike has a scorpion-like tail that moves back and forward. What's extra cool about this set is that the pieces from all three kits combine to make the Robo Combo. Instructions for this build are available on the K'Nex website, and the link and download code is available on the back of the instruction book included with each kit. Time to get building! – Laura
  • Item #: 060200
    Retail: $279.99
    Rainbow Price: $181.69
    If you're a mini-golf fanatic, perhaps the next step is to make your own course. This crazy set from K'Nex includes all the pieces (and instruction) you need to assemble a 9-hole mini golf course, complete with a Ferris wheel, jumps, ramps, spirals, trap doors, loop-de-loops, and more! The course can be used indoors or outdoors – but you may want to bring it inside before it rains, due to the cardstock flags. Two putters and four golf balls are included so you can play with your buddies. Putting together this set does require a considerable time investment. Once completed, however, the set can be left intact, provided that you have a place to store it. Definitely not just a thrown-together putt-putt kit – this set will challenge kids and adults alike with its varied obstacles!
  • Item #: 060198
    Retail: $79.99
    Rainbow Price: $69.75

    This clever K’Nex set is specially designed for educational use. It features seven different models including a windmill, shuttle ride, sail car, wind-powered water lift, hydroelectric generator, hydro car and a grist mill. The assembly instructions will show you how to build the models while the teacher guide will help you use the finished designs as a part of a lesson. A really great way to incorporate kinesthetic learning! – Laura

  • Item #: 063458
    Retail: $49.99
    Rainbow Price: $43.95
    Build five military vehicles with this 539 piece set! Your Helicopter, Tank, Drone, Anti-Aircraft Vehicle, and Armored Personnel Carrier will be ready to roll with battery-powered motor and missile launcher with 3 foam missiles. All K'Nex rods and connectors are made in America, about 98% of this set. Includes military K'Nex figure. 2 AA batteries required, not included. - Laura
  • Item #: 063462
    Retail: $19.99
    Rainbow Price: $11.68
    Build ferocious dragons, attach the motor, then attack! The Stompz set has a lot of green pieces, while the X-Flame set has more black, blue, and purple pieces. Each set builds three moving figures, but directions for others are available as a free PDF download on the K'Nex website. Motor requires 2 AA batteries, not included. – Laura
  • Item #: 064350
    Retail: $399.99
    Rainbow Price: $319.95

     Take your K’Nex to the next level with this programmable robotics system. This set has over 800 pieces, programming software, a control box, 4 motors, 1 push-button sensor, 1 distance sensor, 1 tri-color LED, 1 color/light sensor, and a downloadable teacher’s guide. Build 9 different models (one at a time) – line tracker, robot, dog, airplane, car, and more. You will need 6AA batteries that aren’t included and the software is only compatible with Windows 7, 8.1, and 10 using a USB port – not compatible with Mac products. Supports STEM and NexGen Science Standards and the kit is large enough to be used by students or a family working in a group of two or three. Video instruction, programming software, user guide, and additional PDF files are available at the publisher’s website. This may look like a toy, but students will learn how to build, program, and control their project, and maybe even come up with some of their own creations. ~ Donna

  • Item #: 067930
    Retail: $29.99
    Rainbow Price: $23.95

     Create all kinds of inventions with this fun kit! This classic K’nex set contains 382 pieces in a handy purple storage tote with plenty of room for storing additional rods and connectors. Instead of traditional K’nex colors, pieces are predominantly green, purple, pink, white, and yellow. The included booklet has directions for 10 models to build as well as a link for 40 more models online. This open-ended set has endless possibilities for a creative builder. Made in the USA. – Laura

  • Item #: 067936
    Retail: $39.99
    Rainbow Price: $34.95

     This 403 piece building set includes all the K’nex rods and connectors you love, but in a fun color palette full of pink, purple, lime, black, white, yellow, and orange. Building directions are included for 7 models with a link to directions for an additional 5 models including the Eiffel Tower, the Sydney Opera House, the Taj Mahal, and cultural icons like igloos, elephants, maple leaves, and more. There’s also a 2.5” figure of world-traveler Ava and Bamboo, her pet red panda for lots of around-the-world adventures! – Laura

  • Item #: 060199
    Retail: $79.99
    Rainbow Price: $69.75

    Harness the power of the sun! This specially-designed set includes a solar panel and features three different models including a solar car, a man cranking a wheel, and a shuttle ride. The assembly instructions will show you how to build the models while the teacher guide will help you use the finished designs as a part of a lesson. Great for a hands-on student. – Laura

  • Item #: 000661
    Retail: $39.99
    Rainbow Price: $36.95

  • Item #: 063464
    Retail: $49.99
    Rainbow Price: $39.95

    Construct a crazy coaster! Use the 561 pieces to build a coaster that's almost 3 feet tall. Explore gravity and kinetic energy as the car travels through 16 feet of track. Motor requires 2 AA batteries, not included. Laura

  • Item #: 063460
    Retail: $49.99
    Rainbow Price: $46.95

  • Item #: 052865
    Retail: $24.99
    Rainbow Price: $19.95
  • Item #: 006987
    Retail: $29.99
    Rainbow Price: $23.95

  • Item #: 000674
    Retail: $17.99
    Rainbow Price: $10.12

    Build a hang glider, motorcycle, surf board and more, complete with a little K'Nex guy to ride them in this 250-piece set.

  • Item #: 048413
    Retail: $7.99
    Rainbow Price: $6.75

    Open the lid to hours of engineering and construction fun with these colorful building sets from K'NEX. The individual sets are all complete, and each includes detailed instructions for constructing all manner of vehicles, structures, machines, animals, and gizmos. K'NEX sets can used interchangeably, except between K'NEX and Kid K'NEX sets, which use different sized pieces. Take a look at the amazing construction possibilities! CD format includes PDF files.

  • Item #: 007973
    Retail: $59.99
    Rainbow Price: $48.95

    Includes 521 K'Nex pieces, allowing students to build 7 different DNA and mRNA models. Models include a flexible double helix, parent molecules wound and unwound, parent daughter molecules, etc. As they build, students learn all about hydrogen bonds, nucleotides, phosphate groups, codons, deoxyribose and ribose sugars, and more. The set includes a 24-page booklet with full color building instructions and a 45-page teacher guide containing 3 instructional modules (DNA structure, Replication and Transcription, and Coding Translation and Mutations), 7 lesson plans, and activities. Biology has never been so much fun! ~ Megan

  • Item #: 032485
    Retail: $69.99
    Rainbow Price: $54.50
    Use the 352 parts in this kit to build 16 fully-functioning replicas of real-world machines, one at a time, and expand upon knowledge of simple machine concepts. Models include: a tow truck (pulley), a paddle wheel boat (wheel and axle), and a carousel (gears). Students are able to investigate and experiment with their models while synthesizing and analyzing information. Who knew that you could learn so much while building with K'Nex? The included teacher's guide is aligned to STEM standards and promotes deeper thinking by asking questions and presenting challenges. – Rachel
  • Item #: 063694
    Retail: $14.99
    Rainbow Price: $12.56

    Build your own K’Nex weapons that fire soft foam darts up to 75 feet! Using K’Nex rods and connectors along with other custom pieces, you can build some pretty serious looking weaponry! Assorted style, you’ll receive either the K-10X building set or the Mini Cross building set (our choice, if you order more than one, we’ll try to assort!) which each contain about 90 pieces and 5 soft darts. You can even combo build both of these sets into a much larger and more impressive looking weapon! Compatible with the entire K’Nex Build & Blast line. ~ Megan



  • Item #: 052866
    Retail: $59.99
    Rainbow Price: $46.95

    Builds 50 models, such as a sailing ship, lighthouse, and fire truck. 750 pcs.

  • Item #: 000659
    Retail: $39.99
    Rainbow Price: $35.95

  • Item #: 048988
    Retail: $25.99
    Rainbow Price: $21.95

    This 334-piece set contains materials to build a T-Rex, Brontosaurus, Pterodactyl and more. Instructions and building ideas are included for over 20 different dinosaur models. Use the motion-activated sound brick to bring them to life! Packaged in a storage container. ~ Lisa

  • Item #: 007964
    Retail: $39.99
    Rainbow Price: $35.95

    If you like to change your mind, this is the set for you! With instructions for building 20 different models, this set is only limited by two things - imagination and the 259 pieces in the set. Generally, only one model can be built at a time, and the choice becomes "What first?" The guitar? The sailboat? The house photo frame or the cat photo frame? That still leaves a shark, swing set, truck, sea plane, trike, catamaran, digger. super bike, windmill, SUV, dump truck, swing ride, cement mixer, dirt track racer, chopper, and a round & round ride to choose from. What'll it be?

  • Item #: 031055
    Retail: $374.99
    Rainbow Price: $294.95

    3,447 pieces dare students to try and construct all of the 60 possible fully-functional machine models! Students learn about five different machine types, effort, resistance, fulcrums, slopes, levers, gear ratios, friction, force, pulleys and much more as they work their way through the included 5 Educator Guides, 57 comprehensive lesson plans, and more! ~ Megan