ROKR3D Puzzles Building Toy Sets Marble Run Model Kits for Adults, 140pcs Brain Teaser STEM Kit for Kids, DIY Hobbies for Men Women, Boys and Girls (Parallel World MR02S)

The media could not be loaded. My 9 yrs old son finished assembling by himself. He did feel a little bit hard when debugging the lift but he made it.

Easy to assemble. Its a very simple model kit to introduce into leds and cutting pieces. Comes with some "nippers" in form of a nailclipper lol, i just used my traditional one for model kits. Recommend having a spearhead scalpel, maybe a nail file, some space to store plastic excess before throwing and patience, along with space to put every piece in order (i used my bed personally). Take into account the part list for the model itself and the lift is different, each have their own, even if they are called the same, use the part list if you need it, its easier that way, also the cables come colored so you dont get confused.Aside from the looks and the process, i dont like the lift. It works and it carries a lot of marbles at the same time, but its noisy as hell and if your table is just slightly bent, the marbles will get stuck and youll have to shake the machine to make it work again. Fortunately, it has some anti jamming methods like a loose top cap in case marbles accumulate and a magnetic tool to manually take the marbles out in case you need it, but overall, its a great product. Im really considering in buying the other version to have them stacked. 4.5/5.0

Fun build but go big! I built a quad stack and looks great when all working together.

Very fun build. Can perhaps be done in 90 mins if you don't take your time removing parts from the sprues and not deburring them. Instructions for the most part were well done and simple to follow. The instructions for how to assemble the elevator towers was a bit convoluted, but I was able to figure it out. Lots of fun to see the machine in action!

The media could not be loaded. Super fun built with my son age of 7.

The media could not be loaded. So... This will be a long post... Since my review applies to both the last city kit, and the future city kit...I am posting this same review for both... I was impressed with the Kickstarter Story for these two marble runs, so I had to get them... First I purchased and built the last city, then two days later, the future city kit... Both are top notch very high quality kits - Great part fitment... Great Instructions for the actual marble runs, but the actual mechanical marble lift module instructions left a lot of room for clarity... Not overly clear, and too easy to miss a step... I actually had to put it together and take it apart many times to get it to work, I wore out some of the screw holes.. Thankfully, both kits have the same mechanical lift mechanism, and you only need one to run them together...I joined the two finished runs with the lift module in the middle (B:A configuration)The last city marble run, runs perfectly 99% of the time... The Future city "jams" on more occasions then the last city kit... It runs OK about 95% of the time...But the marbles sometimes get stuck, and clog up the track path... The biggest issue for me is that when you electrically join the kits, no matter who is "primary", and which is "secondary", the secondary one has a mind of its own if you run them on the 10-minute timer.... The "B" kit lights turn on and off at random, regardless of what the master "A" kit is doing... If you turn them on from the "A" kit, and turn them off manually before the 10-minute timer shuts them off, they are fine... When you let the 10-minute timer turn them off - that is when the "B" unit decides to do what it wants... Turning off the power and waiting a minute, then only turning them on and off manually, seems to solve the problem... I was going to purchase one more of each, to make the 2-wide, 2-high version... But based on the fact you can not get two to sync electrically correctly, I do not want to waste the money on 2-more kits, for fear four of them will never ever sync correctly... Can't wait for the next kit to come out... I really hope they make more... One final note... Make sure they a on a level surface both front to back, and side to side... They are VERY sensitive to any out of level situations... They need to build a little bubble level into the top of every case to ease placement...

I got this for my 11 year old son and we assembled it together. It was a fun bonding activity and required a lot of attention to detail. We had some debugging issues but sorted those out quickly and now it works great and looks fantastic.

My boyfriend spent hours putting this together—only for the elevator portion to not work and fry the circuit board for the entire system. It was incredibly disappointing and I wish I had bought him ANYTHING else as a gift. Save your money.