ROKR3D Wooden Puzzles Marble Run Set - Mechanical Model Kit for Adults DIY Roller Coaster Toys Gifts for Boys/Girls (Marble Parkour)

True, there are some small errors in the instructions. And of course, it is desirable that you or your child have THIN AND LONG fingers)))

This was really fun

Awesome, my brother loved it! He is VERY good with complicated Lego sets and such, so he loved doing this. It took him three evenings to complete. The only reason I docked a star is because he sent me a pic of the size of some of the pieces, and it was literally the size of like a half of my pinky nail. He said there were a lot of pieces like that. But it works great and was still well worth it!

This was my second ROKR project. I will be ordering my next one today. These machines are amazingly well designed, fun to assemble, and fun to see in action. That said, they are not for people who are easily frustrated, impatient, or who cannot closely follow instructions. Some of the negative review say that the pieces are hard to put together, fragile, etc. That's all true. However, this kit is entirely assembled without glue, screws, or other connectors. The pieces MUST fit tightly in order to be a stable structure. It is a very solid piece when properly assembled. The pieces are all laser-cut wood that you push out of a sheet of wood (i.e. many parts on one sheet of wood). So, you must be very careful when punching them out, but they come out easily. My first kit was the "Marble Night City" kit, and I would probably recommend that one as a first kit. I learn a lot about how the pieces fit on that one that made this one easier. I did break a couple of pieces on the first kit, but they were easily repaired with wood glue. I didn't break anything on this kit. If you are in a rush, this is not for you. but if you like careful assembly, you'll love this. BTW, I would not recommend this for kids. They say 14+ years, but I think 16 is a minimum.

It is hard for a mom to get gifts for sons. Clothes are boring but welcomed, food is ok, and tools are well received...but how many of those can you really give? This was received with excitement, and I even got a text with a video when it was finished, thanking me for it. I will probably borrow this back when I teach my middle school science/engineering class on Rube Goldberg structures and rollercoasters. If you had smaller puzzles to build I could fit those into stocking stuffers...hint hint.

The media could not be loaded. My review is for the “marble squad” version of the kit.This is a complex kit that works surprisingly well for something with 8 metal pieces and hundred of plywood bits.The design is very thoughtful and a lot of work went in to designing something that’s difficult build wrong:* every piece has its pet number etched *on* the part so you can identify it even if you pop it out too early* all identical pieces have the same part number making it easy to keep parts sorted* lots of pieces either can’t fit when flipped over, or are symmetrical so it doesn’t matter* subgroups have little labels etched on them so they’re easy to identify when you need them* the smallest pieces, the tiny pegs, all have spares includedMy few minor tips:* the laser cut wood can be harder to pop out with your fingers, an exacto knife might be useful here* the included tool can be used to slip the little plastic fairings on the steel shaft. Otherwise this step is quite difficult!* use the included wax liberally every step where it’s indicated on the instructions!*dont worry too much if the gearing doesn’t look perfectly true in the first stages of assembly, the whole thing gets more rigid once it’s completed and the stair stepper particularly feels quite janky until the bottom pieces go in.——-It’s a really lovely kit, I’ll definitely try another ROKR kit in the near future

Very intricate, and fun to assemble

My fiancé loved building this, the only downside is that the gears stick and don’t turn the way that they should. The marbles complete the run perfectly if we drop them from the top by hand, just disappointed that we can’t use the lift.