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

Not gonna lie - it took a LOT of hours for us (2 engineers) to put it together but we really enjoyed every moment and it's so stinkin' cool! Amazing design! I'm in awe

Genial regalo

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 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 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.

Parts neatly packed in box. Also well packed for shipping. Well received by gift recipient.

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 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.

Love it

I looks impressive and my son is the one who is going to build it. He thinks it's really cool and is right up his alley for complication. I is like a a larger one that is on YouTube that plays music. Took a month to get here to Australia but I expected it to take a long time.

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.

Loisir mais plusieurs pièces mal découpées.

très bonne qualité et très précie