ROKR Marble Run 3D Wooden Puzzles Model Building Kits for Adults - Educational Project Brain Teaser, DIY Crafts for Adults (Fortress)

I received this as a gift. The fit and precision of the parts was astonishing! It takes significant finger strength to push the pieces together. Also a lot of manual dexterity to assemble the very small parts. The kit comes with sandpaper to help too tight pieces go together. I only sanded one piece as there was interference in the assembly otherwise. Very few errors in the instructions, and all were minor and easily resolved. The instructions were 3-D drawings like IKEA, only on steroids! I finished the assembly in about 12 hours and it worked! It was a little confusing that there were about 10 pieces left over. I went back through the instructions and concluded that these were spares. This would have been a fun thing to put on display at my office. Alas, I am 66 years old and retired. Still a 14-year-old at heart!

This is an amazing kit. My 12 year old grandson and I worked on it together. The quality of the product is very good. Pieces are precisely cut and fit together very well. Instructions are pictures and pretty easy to follow. Very important to follow them in order. Marble run works great!! He loved it! Took about 6 hours!

Got this for my 13 year-old who loves Legos, engineering, and building. He has used similar building projects from his engineering class in school. He said this one was better quality as all the pieces fit together perfectly and there was no adjusting or sanding needed. The directions were clear. His only complaint was after assembling, one of the pieces doesn't always move correctly so the marble doesn't start on the path. Overall he was pleased with this.

I built this in about 2 days, and it works great! It’s very fun to look at and the instructions are clear. Being as how the pieces are made out of wood, the pieces CAN break. As long as you follow the directions carefully and don’t force pieces into place then you’ll be fine. I would not recommend this to younger kids unless you are doing it with them because some pieces can be hard to places and the pieces can break. The smaller pieces come with extra parts so it’s fine if one of them breaks. Overall I really enjoyed making this and if you can follow instructions then it’s the thing for you!

This is one of four ROKR kits I have. They are quality-made precision cut parts that can be assembled without glue or tools, however I found that glue in some places and some tools make the assembly easier (see photo). Assemble on a hard surface to ensure the base is completely flat. A small flashlight, magnetic screw driver, needle nose files, seam ripper, etc. are helpful. A magnifying glass is needed to see the orientation of some parts in the instructions. It is VERY important to lubricate moving parts, especially those that slide. I used the wax provided and added Sewer's Aid (silicone oil). The oil enhances the wax lube and the oil is able to reach places that are difficult to wax - such as gear teeth. Check for proper assembly and free movement of moving parts during each step of assembly.

Love doing regular puzzles, but decided to try something 3D this time. It was great fun! The material quality was top notch, the engineering was incredible, and the instructions were some of the best I've seen. If there's any ambiguity, I always put things together wrong way first before getting it right. I had no do overs with this. After a little fine tuning, it worked perfectly! A lot of the connections require a great bit of force. Using the provided sandpaper to knock down the edges on the male connectors is advisable to get a good start before the major pressure begins. Good luck!

This is not simple build, it takes some time and effort to put it together which makes the whole process much more fun. The end result is a very cool marble run that my everyone likes to play with. The wood pieces are thin but strong enough for this build. There are a few pieces that needed to be lightly sanded but all considering the overall quality of the kit is quite good. I like this one so much I bought another version that Amazon has available.

I bought this puzzle to work on with my son. The instructions come in the form of pictures, much like the Lego kits - are easy enough to follow. The pieces come precut in several thin boards of wood. Detaching has not been a problem. However, when fitting the pieces together, several have easily broken apart rendering the piece unusable. I've had to superglue a few together using small pieces of paper towel to reinforce the repair. You also have to get creative with how to get some parts together as they have to be manipulated in tight spots. Overall, I wish the pieces were a little more sturdy. We are enjoying putting it together and seeing the progression toward the end product.

I haven't done one of these before and thought I would try it. At first it looks like a daunting task, specially when you see all the pieces. I admit it was fun putting it together, but here are some things to keep in mind. The instructions rely heavily on you paying close attention to the details as one piece can easily be installed backwards if you don't look careful. Cutting the pieces out from the stencil requires some care. I strongly suggest you cut out a few of the larger pieces to get some practice. The hardest part for me was snapping the pieces out careful enough so you don't break them. Make sure you take you take your time taking them out as they get damaged very easily. The pieces don't really snap into place, you have to push them into place and judge that they've gone far enough. You'll need sand paper for sure, I bought some extra, which I used to lightly sand some of the edges off from the connecting pieces. I found sometimes some of the pieces didn't want to "snap" in so a little sanding let the pieces slide in nicely. Just be careful as you can end up with a piece that's too loose. Finally... keep in mind that this is a patience game. You must have patience or you'll get frustrated and could easily break a piece. Overall, the whole process was fun, a little stressful sometimes, but definitely satisfying when it was all complete and worked!. I will buy another one... but I might just have to wait a bit before I decide to commit myself to going thru that process again. I have large hands and can be a bit challenging working with small pieces. As you can see from the pictures, the Quality of the product is GREAT! ... it's important to have good quality on these types of puzzles, or they just won't work well when you put them together.

Very detailed work, the quality is great and the the build is fun

Quality and logic thinking.

well engineered and fun for those that haven't seen it work

This is a great project for anyone who can do lego technic but lego is plastic and this is wood. It is a little more fragile. That said the design is great. The instructions are fairly straight forward. It is a fun little toy. Took about 5 hours. It is hard to gauge because I took 2 weeks to find the time... 2 younge kids. Enough said. I do suggest using the wax on all the gears and metal bars. I would buy again. I am looking into which I should get next.