Cyclone - 900+ Pieces, Building Brick Set, Gravity Powered Roller Coaster Model, Promotes STEM Learning

The media could not be loaded. This was a fun and entertaining little roller coaster kit to assemble. My son loves it! On the contrary to what others claim, the instructions are actually quite straight forward and easy to follow. It does take a little planning and time to get everything setup, but in the end, it all falls into place and works beautifully. The tracks are split and they snap securely into their mounts. It seems most whom have had issues with this kit, may have missed this crucial step. I’ve read some people have even used glue to help get things to stay in place, but I can assure you, no adhesive of any kind is necessary. Take your time, use your head, and it will work!

Good for the price. The child who received it for Christmas was quite pleased.

The track is absolutely awful! It is twisted and continuously pops out of the crossties at the top of the hill. Also the cars do not catch on the chain so it does not go up the hill. This was a school project for my son and he will be very embarrassed demonstrating something that doesn’t function.

The media could not be loaded. When my 8 year old asked for a Lego coaster and I saw the prices, I was in shock! I’m glad I found this option for much less. It looks great and resembles the “Little Dipper” at our local Six Flags. My kiddo built it with minimal help (just installing the chain and rail) and enjoyed the process. The instructions aren’t quite as detailed as Lego but he got used to it quickly. The quality seems excellent and the structure is sturdy. Even I enjoy cranking the wheel to pull the coaster up the rail and watching it wizz around so smoothly. The experience has stimulated my son’s interest in engineering and I’ve already bought a larger Cdx coaster to tackle next.

Our 8 year old grandson enjoyed this kit, but I noticed a few technical issues: (1) The curves were achieved by using 4-unit bars in the inner circumference and 6-unit bars on the outer circumference. Add in 1-unit for the supports. This gives an inner radius of 15-units and an inner circumference of 94.248-units. The problem is that this isn't an integer, so when one makes a "circle" of 16 "22.5-degree" segments, it doesn't exactly equal 360 degrees. The problem is due to the fact that the sine and cosine of 22.5 degrees is an irrational number, so using conventional blocks can't possibly create these angles exactly. The only way to solve this problem would be for the kit to have customized 22.5- degree turn bricks. CDX should do this. (2) As mentioned in other comments, the instructions aren't as good as they should be. (3) As mentioned in other instructions, you really need needle-nosed pliers to add the rails. And (4) The compatibility with LEGO is very good, but not perfect.

14 year old builder versus the instructions book.Got to the step where you measure and cut the railing. Well a small snippet off and suddenly more broke off.Also it’s very fragile on the base.We don't usually glue the projects, but this one is getting "the krackle" treatment.

My grandsons like to make a diorama every time they visit me and my youngest wanted a "working" roller coaster. He just turned 10 in June and he put this together without help UNTIL he got to the rails the roller coaster travels on. I had to use a pair jewelry pliers to get them on. It was tough! You MUST add the extra rail braces (shaped like short black "Ys", in between the braces that fit on the blocks. They keep the rails lined up.ALSO, you really need to get the link belt TIGHT!We added lights, made a water feature, my grandson painted a watercolor mural for the back and sides, he made a tree and we added lights to it in the center, and then I reworked a cardboard box which I lined with felt/faux leather, and the watercolor murals. I seamed it with Velcro so it closes up into an easy to transport box.The coaster is easy to operate without issue IF you get the link belt tight.

Well, it is a nice looking item but it has many flaws. 1) missing parts after putting it together, the plus part is that I contacted their Customer Service and they will be sending the parts 2) the railing where the wagon train goes it is a pain to install, it is all plastic and bended in some places where makes it impossible for the train to roll properly, I will see if I get it to work but I had to stop. Not very easy and the instructions are nothing but small pictures. If you buy it - be prepared to put it together quickly or you may get stuck with it after 30 days.