UGEARS STEM Lab 3D Puzzles - Play Set STEM - 3D Wooden Construction Kit - DIY Mechanical Science Kit - Scientific STEM Toy with App Wooden Model Kits for Adults and Children 8+ (Differential Gear)

I've never made anything before model wise but the instructions were easy to follow and everything you needed to build it was included in the box. There are spares of some of the parts just in case they got broken or lost maybe. My favourite part of the build was popping out the pieces and then my husband actually put them together so it was a nice lockdown project for both of us to complete. The pieces were very well constructed and overall the model works and looks good. Very impressed for the price and would purchase some of the other models from this brand.

I've always wondered how a differential assembly works in steering a car, and at last I understand it! I am a committed fan of these superb models, and cannot recommend them highly enough. Buy with confidence.

Quality is very good, functionality is great. Not the easiest build, needing some parental support but fun to do. Some model building experience helpful.

What a smashing item for this price. Easy and enjoyable to build, fun to use and after 39 years I finally understand how a differential gear works :D

Was cut very precice and works amazing! Very happy

Great fun works well.

I had bought one UGears model before, and was delighted. THis Differential model kit is just the same. Very well made, the laser cutting is precise and accurate, giving you more time to enjoy actually building, rather than fettling the individual pieces. Recommended!

We loved this. Made it on New Year’s Eve.

Good initiatives in learning the fundas.

図解が優秀。プライアと金槌は準備必要。部品に塗る蝋が付属している。

Molto semplice da montare. In un paio di ore, se la si prende con comodo, ed è finito, bel soprammobile per gli amanti della meccanica.

3D wooden puzzles are my favorite hobby, I’ve assembled all different types from clocks to elastic guns and marble runs. This was definitely one of the funnest and neatest ones I’ve done, and the price was very inexpensive.

This STEM kit is really well done. The parts are easily separated from the boards, sturdy, and fit perfectly. I'm used to "tweaking" the fit on many of these wooden kits, but this was a pleasure to build, requiring zero tweaking. It's complex, but the directions are pictorial and easy to understand. I would have no qualms about giving this to a younger person (8+), but would say it might be more enjoyable if an adult participates. It's important to take your time (measure twice, cut once, as they say). I had zero breakage, but have lots of experience with these kits. There are many spare parts included, just in case. Nicely job, UGEARS!