FerroFluid Display Toy Bottle – Dancing Magnetic Fluid STEM Toy – Interactive Liquid Metal Desk Toy with Neodymium Magnets – Educational Science Kit for Kids & Adults

I have as much fun with this as my 10-year-old! The magnets are VERY strong, and the glass bottle is thick and sturdy. Among ferrofluid gadgets, this one is equally affordable and fun. From making little spiky shapes to shadow-like swoops, I'll lose track of how long I've been futzing with it.

This is very fun to play with! The appeal to this for me is mostly experimental. I like learning about how distance/angle/motion of the magnet causes different reactions with the ferrofluid. I also enjoy the idea that it reminds me of Venom. It's like having a miniature Venom in a bottle!I would recommend this to others who find enjoyment in simple things.

The kids love it. Very cool and educational.

My eight year old, loves science, and watches, science, videos, where he saw someone using ferrofluid. He begged me to get this for him, so as a reward for good grades, this is what he wanted. He loves to play with it, and will pull it out to show his friends when they come over. The only reason I gave it one star is because the magnets came apart really easily and and got stuck to each other. We eventually got it unstuck, but it took a lot.

My son is super into venom right now, and asked for a big ferro fluid “box”. Because he’s still very young I decided to start with this first. It’s actually really cool and he has been taking it with him everywhere!

Bottle opened up and splattered all over my son's face and the wall on first use. This took a long time to wash off him and our wall needs to be repainted with a primer that will hide the black splatter. Major regrets.

My 10 year old got this as a gift and likes it, but my younger kids love to play with it with supervisor since the container is glass.

Magnets cracked and broke