3D Puzzles Electric Marble Run Model Kits, Building Sets for Ages 14+, 3D Puzzles for Adults, Boys Girl Birthday Gifts, Parallel World-The Future City（MR02S）

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.

The media could not be loaded. 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.

The cord to power it, is way to short

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

I have this and another Future City marble run, and I absolutely love them. They are a really fun and pretty easy build, and they work extremely well. They integrate together, so when put side-by-side, the marbles go up one channel and alternate which side they go down, so the run is very uniform. This one has some very cool elements, including surprise drops and a funnel, and the lights are really beautiful, especially in the dark. I have found myself watching this run for several minutes, mesmerized by the falling marbles and blinking lights. It's a bit noisy, but that's frankly part of the charm. I'm really excited for there to be more so we can build upwards. Absolutely love this marble run!

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.

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.

A fun gift for the mechanically minded kit builder. Fairly easy to assemble and can be done by a young person with supervision easily. Assembly Instructions are pretty clear, just use some common sense. Once made is colorful works well and makes a pretty good book end.I'd certainly recommend giving it a try.