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Your cart is empty."Get ready for the ultimate building set for aspiring engineers and thrill-seekers: the K'NEX Marble Coaster Run with Motor! This innovative new set allows you to flex your creative muscles and build a fully-functional marble coaster from the ground up. With over 500 pieces and multiple template builds, this model kit is perfect for all skill levels from beginner to pro. Hook up your coaster to the working motor and watch your creation come to life with exciting movements and chain reactions that you can watch again and again. And with its sleek blue and yellow coloring, this coaster will look great in your game room, living room, or even your office. Recommended for kids and kids-at-heart ages 8 and older. 500+ PIECES This epic building set comes with over 500 pieces, including 3 accordion tubes, a see-saw marble scoop, and a bankshot bounce pad that will really add some WOW to your coaster! MOTORIZED MOVEMENT Experience the excitement of watching your creation come to life with the battery-powered motor! 3 BUILDING LEVELS This kit is ideal for builders of all skill levels. Kids can start with the beginner build, then work their way up to WOW with the more complex templates. SPIRALING COASTER TRACK Create epic designs for your coaster with 11-feet of spiraling coaster track - how cool! STEM/STEAM TOY The K’NEX Marble Coaster Run with Motor building set is both exciting and educational - helping children develop fine motor skills and learn about engineering and architecture. "
Falcore5
Reviewed in the United States on January 8, 2025
Good luck putting this together. The pieces are not exactly precise and even when following the directions things need to be constantly adjusted.I needed to improvise and make some modifications to make things work and when they do work it's only temporary before something else needs adjustment. It's like the pieces fit together just fine but it doesn't line up correctly causing the marbles to fall, get stuck, or fly out of the catch tray.My 9 year old had no chance of getting this built so I had to do it. After building it and trying to bend and push things into alignment I even managed to draw blood trying to make this work. Definitely not fun putting it together and messing with it all of the time. Hope this review helps.
Ant
Reviewed in the United Kingdom on January 13, 2025
Bought for my 9 yr old nephew and he loves this. Almost educational too in how it gets him thinking and creating!
Cindy Williamson
Reviewed in the United States on January 11, 2025
This was purchased for my grandson and he is having a blast putting it together and playing with it.
Lynda
Reviewed in Canada on July 6, 2024
Cadeau offert à mon petit-fils. Très content, il aime beaucoup ce jeu même avec l'aide de ses parents ils n'ont pas réussis à l'assembler correctement pour que ça fonctionne. Malgré les instructions pas très claires et des vidéos. C'est désolant car très cher.
Kevin
Reviewed in Canada on June 5, 2024
My grandson used this along with his other sets and had hours of fun.
Corin Weisbrodt
Reviewed in the United States on December 29, 2024
The overall product design was great and fun for me and my son to put together but the pieces are small and made of flimsy plastic. After putting it together and putting batteries in it the product worked for a few minutes the started falling apart I’m guessing from the vibrations of the small motor.
Joe
Reviewed in the United States on January 3, 2024
I will never take for granted the simplicity and elegance of Lego products. Everything about this product, my first knex product, was a disaster. Instruction booklet is awful, filled with confusing and terribly unhelpful pictures, and diagrams. There were five different lengths of the exact same color and shape kind of piece. In the countless different ways that they could have simplified the instruction and indicated some help to the user on how to differentiate which piece was needed, they failed to do so. Upon completion after much frustration, I realized that I was missing a few pieces. It’s possible that it can easily be confused as to which size piece they were looking for, that I may have incorrectly placed an item. But at that point, it didn’t matter. The final product was wobbly, the balls did not fall into the correct placement for many reasons, and it was a total disappointment. Additionally, the way the item is explained, makes it seem like the three different steps that are mentioned are three separate levels that can be independently done. Not so. Level one is just the first set of steps, and does not independently work on its own. I assumed once you completed level one, which would be an easier build, it would work on its own, as just an introduction as to how the whole system would work. Level one is just the first 30 steps. Once you finish level one, you have a product that is 1/3 completed, and that’s it. You then have to complete level two, and then level three, for the item to actually function. As I said, the way, the item description is written, makes it feel as if, you could work your way up to the third level, and that each level was independently a functioning part of this toy. Big disappointments, and the last product I will buy from this company.
Bruno M
Reviewed in Canada on April 5, 2024
This product is horrible. I would give this 0 stars if it would let me.I bought it for my son as a present. He is 11 and very talented at building stuff. He built the whole thing but couldn't get it to work so we took the whole thing apart and tried building it together. I thought maybe he had made a mistake along the way. But now I realize he had not. After rebuilding it together, it still doesn't work. The hooks fall off the track everytime they go around. Marbles fall off the rails before reaching the end. My son is hugely disappointed. I feel like we wasted our money.FYI, I have written 1 or maybe 2 reviews on anything in my life. But this toy is so bad I had to write a review.
Brittney Sims
Reviewed in the United States on December 30, 2023
My son is pretty happy with this. Down falls to this is none of the pieces are labeled or in separate bags, and the manual to build have to be studied in order to attach the right size pieces and in the right locations, and there are a lot of pieces!! This is about a 4-6 hour set up, takes a lot of patience! The age appropriateness I would say is much more advance then an 8 year old level. One of the most difficult I have built out of several!
Customer
Reviewed in the United States on November 23, 2023
The print instructions aren't bad by any means, but it was a little challenging to figure out which rod to use where given they're all the same color.There was a small piece of paper tucked in the book that provides a link for troubleshooting. I took a look-it sends you to a video that does a good overview of building the model and making it work well.More importantly, in the video description there's another link for updated web instructions that include extra letters and numbers that really spell out what to use where in each step.I had the instructions up on my laptop and printed out the slip sheet to organize the different rods-worked like a charm! Great build, lots of fun, and a good amount of support material-would definitely recommend to anyone young or old that likes to build or tinker!
Lou R. C.
Reviewed in the United States on October 8, 2023
I got this for my son and couldn't be happier. He plays with it for hours. The different builds are challenging but easy enough for him to do it without any help. He loves all 3 stages. Highly recommend this set.
Customer
Reviewed in the United States on October 10, 2023
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