3D Puzzles Electric Marble Run Model Kits, Building Sets, 3D Puzzles for Adults, Birthday Gifts, Parallel World-The Future City（MR02S）

I linked this ROKR kit to The Last City and you only need 1 set of marbles when they are linked. It was a joy to assemble amd it's fun to watch! It makes a bit of noise, but that's part of the fun! I recommend getting both of them. I have it configured in B to A. Only the flipping paddle at the top needs to be changed when you add a B configuration model to an A build. The pieces are precision fitted. Make sure everything is flush and that it's set on a flat surface.

Rokr makes fun models of good quality, though I've only done wooden ones before. This one is very enjoyable with great aesthetics. Instructions are clear, parts are clearly marked and all the little tools you need are included.

Super fun to put together, it took me a out 1.5 movies to put it together. It did take a minute for the lift to move high enough for the ball to move up, and the balls do sometimes get stuck even with the directions having you check that they aren't. Also, balls occasionally pop out the lift side.

Good quality and instructions. It was very fun to put together.

I saw this on YouTube and I had to have it. The model kit itself is decent quality, doesn't need painting or stickers, and when it's all put together looks really cool. This is not a great build for beginners as the instructions are difficult to follow as there are multiple configurations depending on if you connect 2-4 of these together into one big machine or just want one. The reason I had to return this is the lift assembly (the one that takes marbles from the bottom back to the top to run down the slide again). It never worked right. I tried ten times with the manual and with a step-by-step YouTube video and it would run for a few moments and seize up, powering off almost immediately. The plastic gears are the most fiddly crap I have ever worked with but they are lined up correctly. The little motor has a magnet in it that makes working with tiny screws around it very difficult. The rails have to be inserted perfectly but have terrible indicators for doing so, and once I did line them up right it still didn't work. I would recommend this company start to pre-build the gearbox section at least as it's too complicated and prone to issues. The fact alignment pins are needed is kind of silly. I feel it's bad design... or maybe my motor is faulty. Not going to try again for the 11th time that's for sure. The USB-C to USB-C cable it comes with is really only long enough to connect two machines together as it's very short and useless to power it on a desk or shelf.

I really enjoy 3D puzzles, including book nooks and marble runs. I was thrilled to get the opportunity to try this Rokr Parallel Worlds Future City marble run and review it through Vine. The instructions are clear and easy-to-follow. I'm embarrassed to admit the part that confused me most was the first page where it talks about how the Parallel World marble runs can be hooked up and show an "A unit". I thought that meant this could only be set in the A position at first, but I figured out later I misunderstood. Any unit can be put in any of the listed positions. The materials were good quality and easy to work with. I appreciated the included angle clippers for freeing the plastic parts from their frames. I also appreciated that the frames were packaged in attached bags, so I effectively had a bag for A-C and another for D-F. It made finding parts much easier. Everything went together smoothly enough, and my marbles passed their test runs through it. I've not tested the included marble lift system yet, and I might not at all. I plan to join this with 3 other Parallel World units, which will only require two lifts to move all the marbles around. I'll update with a video and more details when that's been completed. Update: Got 4 Parallel World units together and working. It was tricky, and it remains a touch glitchy for the electronics at times, but it works!

The worst thing ever it only run for two seconds and stops

This is a marvelous marble run with cool sounds and flashing lights. The marbles split up and speed through various pathways. They move through winding paths, spiral down chutes, and drop between sections. Then, they reach the bottom and are collected by a neat lift mechanism that raises them back up to the top. When everything is running smoothly with all fifteen marbles, there’s marbles moving constantly throughout the marble run while simultaneously being loaded. The marble track is futuristic with flashing neon lights, transparent sections, and plenty of signs. Between the clanging of the marbles moving through the marble run and the lift mechanism, the sounds are reminiscent of a pinball machine. There is so many awesome features packed into such a compact design. This marble run operates almost flawlessly with only a few places where the marbles get hung up or drop out of the track. However, these can be adjusted and fixed accordingly. The build process for this marble run was fairly simple with parts quickly and easily snapping into a back grid. There was no need to cut out or trim any parts. The instructions were clear with detailed diagrams showing labeled parts and how they connected to each other. I had issues for a while trying to get the lift mechanism working. I incorrectly placed one part and needed to realign everything using the holding pins. It’s incredibly important that the moving parts for the lift mechanism are lined up so the two holding pins can be inserted before placing the two main parts of the lift. This ensures everything is properly lined up and will function. Also, it's not clear why there's two USB-C ports on the back of the unit. This is a highly recommended marble run maze because it’s an easy build, it’s quite the spectacle to watch, and it runs flawlessly after a few tweaks.

My 6 year old loves this toy! We enjoyed putting it together and love how the elevator works - it connects perfectly to another set we have and feeds the marbles to both at once (other set we already had, but I believe you can connect up to 4 sets together!). I would love to see more versions of these made. Highly recommend.

It works like they say. Very entertaining

bought this to combine with my Roku set, fits perfectly

Je l'ai offert en cadeau à mon fils. Il a adoré.

ordered twice and twice the item doesnt work. 1st time it came already open missing lots of pieces, 2nd time screws wont tighten and elevator will not work