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

This was a fun project for my 13 year old grandson and me to work together. There were a few tough parts to assemble but it went together very well overall. The parts are laser cut and very precise. It is amazing how strong it is when assembled as there are no fasteners or glue used to hold it together. We had a small problem when finished as the marble run did not work as expected. We found that we had assembled one of the paddles backwards, and though this was a slight deviation it did make a difference. A little disassembly to correct this and it all works like it should. We did use a little glue to hold some of the raceways in place at an optimum angle, as they could shift slightly when moving the completed assembly. Once completed the operation is very mesmerizing as you operate the hand crank and watch the steel balls being moved around and operating various mechanisms along the way. Every now and then there is a glitch where a ball can jump the track. We found a dowel rod with a magnet glued on the end works well to pick up a ball that falls on the inside of the mechanism. There are assembly steps that have an exclamation point next to them indicating a critical step. It is important to ensure these steps are completed correctly to ensure the mechanism will work correctly. We spent 4 to 5 hours assembling and now there will be many hours of just playing with it.

I built this with my 2 sons, ages 10 and 12. We built it in about 2 days and it definitely requires some patience and gentleness as the pieces can be easy to break or damage if you're not careful. Definitely use the sanding tools to smooth out rough edges and lubricate where indicated.

It was definitely only for an adult to assemble. Kids will struggle. I’m good with my hands have good carpentry skills and it was hard for me to do without a little tweaking of parts. On the upside it works, it doesn’t work anywhere near as smoothly as the videos but it works. It is also smaller in real life than the pictures make you believe. It was however fun to put together and see working. It’s a challenge and I’d buy more of similar styles.

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!

It’s a pretty cool marble climber. Would definitely get another one

My son liked it.

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.

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!

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.

Love it

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.

Fun to put together! Great value. Good for people who like to tinker. Takes time to complete.

My stepdaughter and I loved putting these together each Christmas.