Mould King 10131 W16 Engine Building Blocks Sets, V8 Engine Model kit that Run, Build Your Own STEM Model Engine, 16-Cylinder Car Engine Building Engineering Toys(952+PCS)

I was impressed by the detail and quality of the parts and the assembly instructions. I would not say it was super easy to assemble and I had to take my time but was fun to build. If any 8 year old can build this kit by themselves, they need to be working at NASA today. If your vison is less than perfect like mine do yourself a favor and download the PDF so you can zoom in on the steps on your laptop. Can be hard to see in the manual. The PDF also has a link to download the mobile app for the model. I did some early testing with the electric motor to make sure the crankshafts were all working correctly. It was fun to watch the crankshafts turn and the pistons go up and down. It was a bit of a shame the crankshaft and cams were mostly covered by other parts and as another reviewer mentioned the cylinder heads are opaque instead of clear. Would have been nice to be able to see the pistons going up and down and other internals more clearly. I consider the purchase well worth the money.

Surprised by the detail and complexity of these kids! I have put two of them together and was challenged by the builds. The number of parts is a little overwhelming at first but most of the parts are used in order if the labels on the packets but not all! One if the models had two complete sets of numbered packets of parts, so it was a little confusing but the instructions are very clear and I think anyone can follow them if you have the patience to follow them. Each step is short and easy to complete. I can't wait for my grandsons to get old enough to build these! The details and custom pieces are far better (and cheaper) than the original brand of bricks. Every time I check, Mould King had released another model with even more detail! Wouldn't hesitate to recommend to anyone!

This was a gift for my husband and he loved it. It was easy to assemble took him about 4hrs (with breaks). Instructions are clear, the pieces are durable and functional. Definitely worth the purchase. The motor works with 4 AAA batteries which aren’t included.

When I build these models my concern is that somewhere along the line there is going to be missing parts. Not here. Everything went together perfectly fine and it runs just like it’s supposed to.

I bought this for my father who is a motor head, he said the instructions are not very clear and there are a million tiny parts...he is still working on it.

Awesome project! Instructions were easy to follow. My son really enjoyed building it and having it run in the end. He was able to troubleshoot the areas that needed fixing.

Was missing some pieces and the battery powered motor isn't strong enough to make it run, quality is not there

Bought it for my husband who used to be a mechanics to keep him occupied on his days off, he’s had such a great time building it. There’s a little problem with the switch but he was able to fix it. It took him about 3-4 hours to build it. It was super detailed even our nephews love it. Would recommend buying this and starting a collection too.