Marble Run STEM Toy. Build Infinite Rube Goldberg Machines. Use The Vortex, Loop de Loop and rampoline to Create Infinite Designs. Motor Drven with 602 Parts 120,000 Sets Sold!

Got this today and have already built the first runs. What is so good aboutthis is that it takes some thinking to design the tracks to go all over the placeand build in the tricks into the tracks. The set comes with instructions but it'smore fun for me to build my own tracks. I bought two sets so plenty of partsto build larger foot print and extra bracing to make it super stable and strong.The big value is I can remove the tracks and rebuild it into something differentas many times as I want. Excellent product and seller has fast shipping.

Not a good purchase. The pieces are EXTREMELT difficult to piece together and are not sturdy. The main pieces that make up the frame are starting to break before I have completely assembled it the first time and there are not enough pieces that you can bend to make slopes. I’m going to have to try to return it to buy a different one and am not looking forward to explaining that to my kiddo. :-(

We bought this for my 10 year old Grandson. He is mechanically minded and likes to build things. He quickly got frustrated so my son and 16 year old Grandson began helping him. It took hours to build the basic set up. This is difficult to put together. I have 6 grandsons and believe this product should be for 12-14 and up. It was what I expected, just more difficult to put together and the instruction sheet was confusing.

Took 6 hours to assemble. Fragile. Comes apart easily.

Bought this for my son for Christmas, impossible to put together, and once it is together and set up it dunes for 5 seconds before the chain snaps. Very disappointed in this product, they probably all end up in the land fill.

I bought this as a gift for my granddaughter so we'd have something to work on together when she visits. We saw this at an interactive museum and she had a great time with it.

This is a late review. I bought the Chaos Tower several years ago for my grandkids. They loved it but tired of it as they got older, so I donated it to the local elementary school. NOW, these teenage grandkids want to make an outdoor marble run, somewhere on my front porch, so we're going to start from scratch with local parts, clear tubes etc. Hopefully the Chaos folks have a hand crank lift elevator. Anyway, it's a great learning toy.

Difficult to assemble and Few parts broke.