Review on Power Up Your Projects With MIKEDE Cube Neodymium Magnets - Super Strong Rare Earth Magnets For Science And DIY by Jesse Nell

This review is for the 40mm x 20mm size.So yeah, if I hold this in the palm of my hand, when I get it close enough to the refrigerator, I can feel it grab hold as it sucks my hand onto the fridge. I can then open my hand and the magnet does not fall to the ground. It does it well enough that I can spin my hand around underneath it, and it still stays magnetized to the fridge. It's not so strong that it hurts or anything though. Not even close. I'm almost a 40 year old man though, so I wouldn't recommend a child do that. But then again, I could be wrong. Anyway, I think it goes without saying, that this magnet could be a danger to electronic storage devices, so I'd keep it away from them. And for that, you could just keep it in the nice thick styrofoam encasement that it comes in. Also, if you make this a gift to someone, make sure you're not, and never are, on their bad side, lol.