SainSmart Jr. 3D Wooden Puzzles for Adults, 225 PCS Marble Run Wood to Build, Electric Driven Mechanical Model Building Kit, DIY Gift for Aged 14+, Roller Coaster

This is a most amazing marble run being motorized. Everything fit very well, with a few parts needing some glue to hold.Recommend for a patient builder. Lots of action in a small space.For the price you cant go wrong.I really enjoyed the build, and will proudly display it.

The model I got arrived on time and was fine when I opened it. But as I started to put it together, the pieces broke as I tried to get them out. I wrote to the company and asked if I could get replacement sheets—I was willing to buy them—but I have yet to receive a response.So, I looked at the puzzle and repeatedly found that people could not build it. I finally had to give up. One person said to buy three, so you can make one, using the other two units for spare parts. I think I could do it with two sets, but do I need to buy another?I would pass. I have to decide whether Amazon will give me a refund. I call it really bad.

It was a gift- my son and his wife loved it, although it's pretty fragile. They had to glue a couple of pieces back together

This is fun to assemble, it works really well once put together, and the pieces are surprisingly high quality and very precisely cut.There was one piece that was a bit hard to assemble, and one of the pieces broke, but they anticipated that, and there were spares of that component, so it was not an issue. I have bought more from this company because this one was so much fun.

This was very fun to build and entertaining.Just take your time and it will turn out great.One of the best build kit I have done

Broke easily

Too many tiny broken pieces, I surrender.

I got this for me and my daughter to put together. The directions were easy to follow, but some of the pieces were delicate and thin. Some of the pieces ended up breaking. This may be best for someone who is patient and can be very careful with putting all the pieces together.