Mechanical 3D Wooden Puzzle Model Kit Adult Craft Set Educational Toy Building Engineering Set Christmas/Birthday/Thanksgiving Day Gift for Adults Boys Kids Age 14+(LG501-Waterwheel Coaster)

We used this for our company team building, focusing on collaboration, teamwork and resilience. Our employees took around 4 hours to complete this. The marble ball size are uneven so some just fall out of the rack, but overall it's really good, pieces are complete, we recommend using super glue so you can display and play with it afterwards.

We had a very nice 5.5 hrs with my partner building it. Instructions are well organized and very clear. A lot of spare parts left at the end, though there were a lot of fragile parts, better to be careful not to break any by mistake.

Entregou o prometido.

I’ve been pleased with the ROKR products we have built, and this is no exception. The craftsmanship is excellent, and they have plenty of extra pieces for things that might break or get lost. My 12-year-old son is very pleased with his marble run. It occupied him for hours on Christmas Day, and he was exposed to engineering and construction principals, like cogs, converting circular motion to linear, and how to use slope and gravity. Our ROKR products get used from time to time throughout the year.

Built it with my 8yo. Everything about this toy is incredible, he had fun at each step of the way checking what individual parts do. And a few days after putting it all together, he still runs to it in the mornings for a few extra turns. A few observations : 1- it is easy to separate the pieces from the wooden panels, but you have to be careful 2- we also used a nail file, wooden glue, tweezers (pressure and cut), screwdriver (used only as a light hammer), and a pin. 2a- The pin was cut when some delicate pieces needed repairing: would put glue with a tiny metal piece in the middle to be sure the structure would hold. 3- there is a lot of extra pieces, but we only broke those without spare, so be extra careful with pieces that have thinner parts. 4- it is great that the identification of the pieces are on the piece themselves, making it easier to find what you need. 5- my 8yo needed help because he didn’t have enough strength at times, and rarely needed a few tips. It was a team effort and very entertaining. We already have another set by the same company, and probably will buy more in the future. Can’t recommend it enough!

There are 2 columns' notch doesn't fit. It's not deep enough and I need to modify it to make it fit. The stairs sometime holds 2 marbles at a time but dropped back 1 when lifted half way. So it landed at the lineup of marbles behind and ended up on the floor. I now limited it to 5 marbles only then it works fine. It's not easy to connect them but it have to be tight to be sturdy. So, it's not really good for young kids to deal with. Overall, it is definately a piece of art!

All the pieces fit together perfectly, and it worked flawlessly after assembly. A little more sandpaper would be welcomed, but not a big issue.