Almost too much power

I use the magnets for my fridge and the kids have so much power that they almost no longer gets down. Also, they are difficult to separate. They can only push apart or push them from the refrigerator. My cards on the refrigerator hang fix there, therefore does not bother me so much. When the magnets but need to hang something over and over again up and down etc. then you'd better look for something weaker.