I had so much fun with this and kids love it.

My grandson and I are passionate marble people.
This is hands down the best ever. The two wheels
and 3 modules, with internal direction changers, create
multiple patterns, and the ability to switch off with other
modules allows infinite permutations. The wonderful
color options are an added bonus and the modules are
not only diverse and interesting, but cleverly named.
We got quick and helpful advice from email inquiries, and
once we ordered the units were made and sent quickley.
We consider this one of our all time best toy discoveries,
for children and adults.

This is ingenious, interesting,
colorful, and interchangeable,
for endless permutations.
Lots of fun, continuing interest,
came quickly. Even the colors are
great.

Seller available and helpful on email.my
Great and unique marble roll and a lot of fun for my
grandson (and me!). Great color options.
Item well packaged and arrived in good shape.

It is very beautiful and fun, it is the one I like the most of all the models I recommend it

5 starts for making this free. Only problem I had was that the chain does need to be tight or it gets caught where the marbles enter. But taking the top off after putting one on is impossible. The layer lines act as velcro. I'd prefer a mechanical tightening system that used a screw/nut. I can see you want all plastic.. but I think some judicous metal will make the models last much longer. https://youtube.com/shorts/gey4UPcToms (your form won't accept this link)

Models and machines are well documented. And it is really fun to print them and see that it really works. I had very little afterwork.
Will buy next machine for sure.

Like all Out of Marble modules, prints easily without support. Works like a charm

This printed perfectly with no supports. The hardware package was installed in minutes. What a great toy.

Not only me als may Kids have a lot of fun

another easy print that just works as it should.

printed perfectly

Easy print and works

some difficulty to print, but solved problem

Very nice. I had some printing problems, I didn't understand if wet filament or anything else. Printing stops many times, the piece splits into layers and breaks. I repeat the print with a different coil, the same. I do the printer reset, repeat the adjustments and finally start again and get to the bottom. To try to bind the material better I increased temperature and reduced speed to 50. mm/s. The only problem, the finish is coarse and the marbles do not flow well. Done a thorough retouching with small grinding wheels for the nails and putting talc at the point where the marbles split into the path, the talc is distributed and runs better.