Magnetic Ferrofluid Science Education Kit – Liquid Dynamics Visualizer for STEM Demonstration – Includes 2ml Sealed Ferrofluid Bottle and Precision Neodymium Magnets

My kids love their "pet venom". There is a bubble in the container the Ferrofluid can get stuck in. I feel like it adds to the experiment, one more aspect to play around with. Add a bit more and you can make it float, take it out and you can see the oil left in the bubble. All around a lot of fun!

I always try to get my nephew cool science gifts and figured he would love this once I saw it. It's a pretty basic kit, you could likely source all the parts yourself but honestly the included magnets and glass bottle have a great look and were worth the price for me. It's on the small size but still manages to impress. Kids had a ton of fun playing with it, attention lasted on it way longer than expected. It did the job, fun toy, educational and kept the kids interest.

My son begged me for ferrofluid for Christmas. And was beyond happy when he discovered this is what I got him. He has enjoyed hours of fun with this stuff, making slow motion videos, and calling it his own piece of Venom ( from spider man). Though, as many reviews have already warned, I will say those magnets to click together real easy. And this causes them to chip real easy. So be careful.

Bought this for my son who loves venom. He loves to move the magnets around his “venom in a bottle”

This is a simple but really clean and tidy way to see how ferro fluid reveals a magnetic field. It's much more sensitive than plain old iron filings. Being contained in a bottle, it's much tidier than raw ferro fluid, which is super messy if you're not super careful. One warning they don't give you is that the bottle cap just screws on (or off) and, if this is given to children, they might unscrew the cap which would release the fluids all over the floor and make one heck of a mess. They don't give any information about what hazard this might be. If nothing else, the ferro fluid will never come out of the carpet. My bottle arrived with an air bubble, and the vendor responded nearly immediately with an offer to send a replacement. I'm very happy with this interesting scientific novelty and the vendor that sells it.

This was cool for about a day, then it broke.

Something my child wanted for Christmas. I didn't think he would play with it much, but he finds it very fascinating and plays with it often. To be honest, it does look like the symbiote from the marvel comics venom which is kind of cool. It was delivered in great shape and on time.

My 16 year old son is incredibly hard to buy gifts for, but he really enjoyed this one. We had a house full of science & math people for Christmas, even the 30 year olds were playing with this stuff.