Alex C.
I am an engineering professor, and I appreciate both the fine woodworking and subtle engineering touches William Le has incorporated in this demonstration. It's handmade finish is flawless, it works smoothly and silently, and is well-deserving of a spot on my desk.
Maggie 2.
This thing is so cool! I'm a sucker for mechanical physics and science demos, and the good ones aren't cheap. After seeing this on social media, I bought a cheap one which turned out to be a poor quality knock-off. Then, I found this real original one and it works just as advertised.
Thomas F.
Arrived pretty fast and it works to my suprise. Thanks from Germany
Caleb G.
This is made of solid wood with a touch sensitive button and battery powered with a charger. Recommend it
Teressa H.
I absolutely love it! I bought this as a gift for my dad after seeing it all over YouTube. It was hard to find the product from the original creator, but I finally found it!
It is beautifully crafted. Beautiful wood, feels solid, and it is hard to tell what is going on for those that don't know. I can't wait to show my dad and see his reaction.