Neodymium NIB Ultra-Strong Magnet Spheres (5mm / 20-Pack)

Pros: very strong little magnets.
I boutght 11 20-packs so that i could
make the NEOCUBE which is awsome. it takes 216 spheres to make a cube thats 6x6x6.

Cons: very small easy to lose
watch out when you use them så you dont trash your creditcards. very sensitive.
all of them isnt compleatly round.

Other: a little expensive for just magnets but its worth it i thing. both me and my girlfrieng got these and are getting better and better to make different shapes.
if you want som funny magnets buy these:D

Pros: These are great for making three-dimensional structures, or sticking notes to the fridge, or using in crafts.
They're spheres, though, so that limits their usefulness. But if you don't want balls, then get the RE disk magnets. These ones are fun because you can stack them into three-dimensional structures. Like cubes. And cubes with holes in them.

Cons: These are probably more fun than they are useful for anything in particular.

Other: Good for creative types. They're like physical puzzle games, poetry magnets, and LEGO all mashed together into a simple spherical magnet.

Pros: These magnets are really strong! They are also more fun to play with (as they are spheres) compared with the disk magnets.

Cons: They are probably easy to lose as they are really small and round (so they tend to roll away). But I guess you could use the other magnets to find and attract the ones that do get away from you.

Other: A little expensive for such small magnets, but they are really strong anyway. They are fun to play with, and you could think of a lot of creative ways to use them as well.

Pros: They are very strong. I managed to lift up quite a lot of weight with them in a row.
A lot of fun to play with, since they're spheres the possibilities are endless.
There's 20, so there's quite a few to play with.

Cons: They're very, very, very small. I expected them to be a bit bigger. However, for their size, they're still strong.
As any natural magnets, they do have repulsive fields, so you need to practice to manage certain kinds of constructions.
They're only 20, and this does limit your creativity to be honest.

Other: If you're easily bored, get a few of these to play with whenever you have nothing to do.

Pros: Great magnets to play around with. You can make three-dimensional structures, play with them to relief of stress, stick notes to the fridge. They're spheres, so when they stick all 20 together, you can "roll" them around with only one hand (in your office or at school. If you don't want balls, then get the RE disk magnets.

Cons: 20 pieces is not quite much: order more :-) and the price is not high. These magnets are probably more a toy than a useful part.

Other: Good for people with building capabilities. Or just to have fun. But enough packs

Pros: can be made incredibly strong with some special methods (can be used to pick a magnet up from a distance of over 10 cm) ideal for demonstrating a gravity engine fun to play with useful for holding (big) kids and grownups buzzy so you don't have to you can let your family believe you have a nose piercing make great bracelets for little children (they won't lose it so easily) can be used to show how a atom looks in 3d

Cons: dangerous with little children (don't let them eat 2 SEPARATE magnets or they may die from internal bleeding) 1 doesn't matter 2 can be lethal easy to lose if one shoots away (Gaussian gun) they lose there magnetic power after demonstrating a Gaussian gun about 200 times you need at least 360 to make complex 3d structures structures are easily destroyed

Other: buy them but buy more buy 360 so you can make cool stuff and impress your friends or your students they will pay attention to your lessons

Pros: - It's fun to play with them
- After a month, still extremely strong
- Do not lose strenght
- you can construct geometric figures
- very useful, for example for Whiteboards or hanging notes against the fridge

Cons: They are probably easy to lose as they are really small and round (so they tend to roll away). But I guess you could use the other Neodymium magnets to find and attract the ones that do get away from you.

Other: Good for creative types. I think I will buy more in the future, bacause the real fun starts with 100 of them, so order more than one.

Pros: you can make incredibly cool stuff with this i made a cool puppet with about 200 of them i made a column of coins with this which is very cool to see useful for demonstrating a gravity motor

Cons: tend to shoot away so you can't find it anymore loses there magnetic power after a lot hits (i made a Gaussian gun) gets stolen by kids a lot

Other: buy it it is very cool but buy a lot of them i bought 260 of them

Pros: These magnets are surprisingly strong! At first I was a bit disappointed by the size, but then I tried the pull the magnets apart and that's when I realized the strength of these little things. Always fun. Looks like it will last for a long time if you don't always drop them. Strong enough to hold as a bracelet.

Cons: Hmm....Well I guess the small size could be an issue. Makes it more easy to lose.

Other: The price makes this a good deal for anyone thinking of buying them.

Pros: They are the perfect size! Really fun to play with. Perfect for building something fun or sticking paper to a metal plate or a fridge. They are really strong!

Cons: They get lost quite easily. Can ruin your credit card or electronic device - but any magnet could do that, so it's really not a con. I need more!

Other: You should definetely buy these! If you really want to be able to do something with them, you have got to get the 100-pack. I love them! :)