any idea where i can get some good, strong magnets? the ones i got from michaels were sort of wimpy, and i worry they won't hold much up (especially with the weight of the marble on top). or, if you get yours at michaels - what brand?

i bought my magnets at michael's and they are pretty strong. the brand i found was "pro mag" by dyna-mite, and it says "extra strong" on the package. if you get really serious, someone had this link up for cheap bulk magnets: page 46 @ woodwrks (at the bottom of the page)