Fragile but entertaining
The concept is fantastic, but the product itself is somewhat fragile. It's a tiny little bottle with the ferro fluid in it. The black cap popped off immediately, the little magnet holders detached from the magnets, and one of the magnets (super powerful), shattered as it fell out of the holder and hit the floor. In hindsight, we should have been a lot more careful with it. But it was quite amusing while the pieces were intact.
Rating: 3 stars